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              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
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            {
              "end": "2019-09-30",
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            {
              "end": "2019-09-30",
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            {
              "end": "2019-09-30",
              "val": 29544000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
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              "end": "2019-12-28",
              "val": 28220000,
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            {
              "end": "2020-06-27",
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              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-05",
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            },
            {
              "end": "2020-09-30",
              "val": 30970000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
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              "filed": "2020-11-20"
            },
            {
              "end": "2020-09-30",
              "val": 30970000,
              "accn": "0001564590-21-004303",
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            {
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              "val": 30970000,
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            {
              "end": "2020-09-30",
              "val": 30970000,
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              "fp": "FY",
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            },
            {
              "end": "2020-12-31",
              "val": 0,
              "accn": "0001564590-21-004303",
              "fy": 2021,
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              "form": "10-Q",
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            },
            {
              "end": "2021-03-31",
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              "accn": "0001564590-21-023320",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-05-04",
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            },
            {
              "end": "2021-06-30",
              "val": 0,
              "accn": "0001564590-21-040209",
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              "form": "10-Q",
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            {
              "end": "2021-09-30",
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          ]
        }
      },
      "BusinessAcquisitionCostOfAcquiredEntityPurchasePrice": {
        "label": "Business Acquisition, Cost of Acquired Entity, Purchase Price (Deprecated 2013-01-31)",
        "description": "The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.",
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        "label": "Business Acquisition, Pro Forma Earnings Per Share, Basic",
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            {
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            {
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            },
            {
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            {
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              "filed": "2013-08-07"
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            {
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            },
            {
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            {
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              "filed": "2014-02-04",
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            },
            {
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            {
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            {
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              "form": "10-Q",
              "filed": "2014-05-06",
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            {
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              "accn": "0000857005-13-000026",
              "fy": 2013,
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              "form": "10-Q",
              "filed": "2013-08-07"
            },
            {
              "start": "2012-10-01",
              "end": "2013-06-29",
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              "filed": "2014-08-05"
            },
            {
              "start": "2013-03-31",
              "end": "2013-06-29",
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              "form": "10-Q",
              "filed": "2013-08-07"
            },
            {
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              "end": "2013-06-29",
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              "filed": "2014-08-05",
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            },
            {
              "start": "2013-10-01",
              "end": "2014-03-29",
              "val": 0.22,
              "accn": "0000857005-14-000010",
              "fy": 2014,
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          ]
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      },
      "BusinessAcquisitionProFormaEarningsPerShareDiluted": {
        "label": "Business Acquisition, Pro Forma Earnings Per Share, Diluted",
        "description": "The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.",
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            {
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            {
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              "filed": "2012-11-16",
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            },
            {
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              "end": "2011-01-01",
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              "accn": "0000857005-12-000005",
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              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2010Q4"
            },
            {
              "start": "2011-01-02",
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              "accn": "0000857005-12-000014",
              "fy": 2012,
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              "form": "10-Q",
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            },
            {
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              "accn": "0001193125-11-218270",
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            {
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            {
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            {
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            {
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            {
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              "accn": "0000857005-13-000009",
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            {
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              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-02-04",
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            },
            {
              "start": "2012-10-01",
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            {
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              "accn": "0000857005-13-000018",
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              "filed": "2014-05-06",
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            },
            {
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              "filed": "2013-08-07"
            },
            {
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-08-05"
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            {
              "start": "2013-03-31",
              "end": "2013-06-29",
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              "accn": "0000857005-13-000026",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-08-07"
            },
            {
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              "end": "2013-06-29",
              "val": 0.28,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-08-05",
              "frame": "CY2013Q2"
            },
            {
              "start": "2013-10-01",
              "end": "2014-03-29",
              "val": 0.21,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationAmortizableIntangibleAssets": {
        "label": "Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets (Deprecated 2013-01-31)",
        "description": "The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized.",
        "units": {
          "USD": [
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              "end": "2009-09-30",
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              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
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              "frame": "CY2009Q3I"
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            {
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              "accn": "0001193125-11-320097",
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              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "end": "2010-09-30",
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              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
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              "filed": "2012-11-16",
              "frame": "CY2010Q3I"
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            {
              "end": "2011-07-02",
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              "fy": 2011,
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              "form": "10-Q",
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            },
            {
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              "accn": "0001193125-11-320097",
              "fy": 2011,
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            },
            {
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              "accn": "0000857005-12-000031",
              "fy": 2012,
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          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationCurrentAssetsCashAndCashEquivalents": {
        "label": "Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents (Deprecated 2013-01-31)",
        "description": "The amount of cash and cash equivalents acquired in a business combination.",
        "units": {
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              "accn": "0001193125-11-218270",
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          ]
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      },
      "BusinessAcquisitionPurchasePriceAllocationCurrentAssetsReceivables": {
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        "description": "The amount of acquisition cost of a business combination allocated to receivables.",
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              "accn": "0001193125-11-218270",
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          ]
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      },
      "BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesDeferredRevenue": {
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        "description": "The amount of acquisition cost of a business combination allocated to deferred revenue of the acquired entity.",
        "units": {
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              "accn": "0001193125-11-218270",
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          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationDeferredIncomeTaxesAssetLiabilityNet": {
        "label": "Business Acquisition, Purchase Price Allocation, Deferred Taxes Asset (Liability), Net, Noncurrent (Deprecated 2013-01-31)",
        "description": "Amount of acquisition cost of a business combination allocated to noncurrent deferred tax assets net of valuation allowance and noncurrent deferred tax liabilities.",
        "units": {
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          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationGoodwillAmount": {
        "label": "Business Acquisition, Purchase Price Allocation, Goodwill Amount (Deprecated 2013-01-31)",
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              "accn": "0001193125-11-218270",
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          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed": {
        "label": "Business Acquisition, Purchase Price Allocation, Liabilities Assumed (Deprecated 2013-01-31)",
        "description": "The amount of acquisition cost of a business combination allocated to liabilities assumed.",
        "units": {
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              "accn": "0001193125-11-218270",
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          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationPropertyPlantAndEquipment": {
        "label": "Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment (Deprecated 2013-01-31)",
        "description": "The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.",
        "units": {
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              "accn": "0001193125-11-218270",
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        }
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      "BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax": {
        "label": "Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax",
        "description": "Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period.",
        "units": {
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      "BusinessAcquisitionsProFormaNetIncomeLoss": {
        "label": "Business Acquisition, Pro Forma Net Income (Loss)",
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            {
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            {
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            {
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            {
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      "BusinessAcquisitionsProFormaRevenue": {
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            {
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            {
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              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-05-11",
              "frame": "CY2016Q1"
            },
            {
              "start": "2015-10-01",
              "end": "2016-07-02",
              "val": 1097000,
              "accn": "0000857005-16-000068",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-08-11"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 1170000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 1170000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2016"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 930000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 930000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2017"
            }
          ]
        }
      },
      "BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh": {
        "label": "Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High",
        "description": "For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.",
        "units": {
          "USD": [
            {
              "end": "2014-03-29",
              "val": 18000000,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-28",
              "val": 18000000,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-08-05",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
              "val": 18000000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-01-03",
              "val": 18000000,
              "accn": "0000857005-15-000007",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-02-10",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-04-04",
              "val": 18000000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2015-05-07",
              "val": 5000000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11"
            }
          ]
        }
      },
      "BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow": {
        "label": "Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low",
        "description": "For contingent consideration arrangements and indemnification assets recognized in connection with a business combination, this element represents an estimate of the low-end of the potential range (undiscounted) of the consideration which may be paid.",
        "units": {
          "USD": [
            {
              "end": "2014-03-29",
              "val": 0,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-28",
              "val": 0,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-08-05",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
              "val": 16500000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-01-03",
              "val": 16500000,
              "accn": "0000857005-15-000007",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-02-10",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-04-04",
              "val": 16500000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11",
              "frame": "CY2015Q1I"
            }
          ]
        }
      },
      "BusinessCombinationContingentConsiderationLiability": {
        "label": "Business Combination, Contingent Consideration, Liability",
        "description": "Amount of liability recognized arising from contingent consideration in a business combination.",
        "units": {
          "USD": [
            {
              "end": "2013-09-30",
              "val": 0,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06"
            },
            {
              "end": "2013-09-30",
              "val": 0,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-08-05"
            },
            {
              "end": "2013-09-30",
              "val": 0,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-30",
              "val": 13048000,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-08-05"
            },
            {
              "end": "2013-12-30",
              "val": 13048000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-03-29",
              "val": 13048000,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06"
            },
            {
              "end": "2014-03-29",
              "val": 13048000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-28",
              "val": 13048000,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-08-05"
            },
            {
              "end": "2014-06-28",
              "val": 13993000,
              "accn": "0000857005-15-000028",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-08-11",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
              "val": 13048000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "end": "2014-09-30",
              "val": 13048000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "end": "2014-09-30",
              "val": 13048000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-04-04",
              "val": 0,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2015-07-04",
              "val": 3800000,
              "accn": "0000857005-15-000028",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-08-11",
              "frame": "CY2015Q2I"
            },
            {
              "end": "2015-09-30",
              "val": 3800000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "end": "2015-09-30",
              "val": 3800000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18"
            },
            {
              "end": "2015-09-30",
              "val": 3800000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 16900000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18"
            },
            {
              "end": "2016-09-30",
              "val": 16900000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29"
            },
            {
              "end": "2016-09-30",
              "val": 16900000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 0,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29"
            },
            {
              "end": "2017-09-30",
              "val": 0,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16"
            },
            {
              "end": "2017-09-30",
              "val": 0,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 2100000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16"
            },
            {
              "end": "2018-09-30",
              "val": 2100000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "end": "2018-09-30",
              "val": 2100000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 0,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "end": "2019-09-30",
              "val": 0,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2020-09-30",
              "val": 0,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual": {
        "label": "Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual",
        "description": "This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.",
        "units": {
          "USD": [
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 12000000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014"
            }
          ]
        }
      },
      "BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual": {
        "label": "Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual",
        "description": "This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.",
        "units": {
          "USD": [
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 26800000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 18500000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2011Q4"
            },
            {
              "start": "2011-10-01",
              "end": "2012-03-31",
              "val": 40700000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 22300000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2012Q1"
            },
            {
              "start": "2011-10-01",
              "end": "2012-06-30",
              "val": 61000000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 20300000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 81500000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 9800000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014"
            }
          ]
        }
      },
      "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue": {
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue",
        "description": "Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.",
        "units": {
          "USD": [
            {
              "end": "2014-09-30",
              "val": 18242000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            }
          ]
        }
      },
      "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther": {
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other",
        "description": "Amount of other liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.",
        "units": {
          "USD": [
            {
              "end": "2014-09-30",
              "val": -3674000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            }
          ]
        }
      },
      "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles": {
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles",
        "description": "The amount of identifiable intangible assets recognized as of the acquisition date.",
        "units": {
          "USD": [
            {
              "end": "2012-09-30",
              "val": 44900000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 54000000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
              "end": "2013-09-30",
              "val": 54000000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 48900000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "end": "2014-09-30",
              "val": 48900000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 13600000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "end": "2015-09-30",
              "val": 13600000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 69900000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18"
            },
            {
              "end": "2016-09-30",
              "val": 71500000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 6000000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29"
            },
            {
              "end": "2017-09-30",
              "val": 6000000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 800000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16"
            },
            {
              "end": "2018-09-30",
              "val": 800000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18",
              "frame": "CY2018Q3I"
            }
          ]
        }
      },
      "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet": {
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net",
        "description": "Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.",
        "units": {
          "USD": [
            {
              "end": "2014-09-30",
              "val": 175475000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            }
          ]
        }
      },
      "CapitalizedContractCostAccumulatedImpairment": {
        "label": "Capitalized Contract Cost, Accumulated Impairment",
        "description": "Amount of accumulated impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer.",
        "units": {
          "USD": [
            {
              "end": "2019-09-30",
              "val": 0,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
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              "filed": "2019-11-18",
              "frame": "CY2017"
            },
            {
              "start": "2017-10-01",
              "end": "2018-09-30",
              "val": 1000000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "start": "2017-10-01",
              "end": "2018-09-30",
              "val": 1000000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2018"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 3500000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 3500000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 3500000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22",
              "frame": "CY2019"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": -3000000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": -3000000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": -3000000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2020"
            },
            {
              "start": "2020-10-01",
              "end": "2021-09-30",
              "val": 7400000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22"
            },
            {
              "start": "2020-10-01",
              "end": "2021-09-30",
              "val": 7400000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15"
            },
            {
              "start": "2020-10-01",
              "end": "2021-09-30",
              "val": 7400000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2021"
            },
            {
              "start": "2021-10-01",
              "end": "2022-09-30",
              "val": 2300000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15"
            },
            {
              "start": "2021-10-01",
              "end": "2022-09-30",
              "val": 2300000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20"
            },
            {
              "start": "2021-10-01",
              "end": "2022-09-30",
              "val": 2300000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14",
              "frame": "CY2022"
            },
            {
              "start": "2022-10-01",
              "end": "2023-09-30",
              "val": -1900000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20"
            },
            {
              "start": "2022-10-01",
              "end": "2023-09-30",
              "val": -1900000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14"
            },
            {
              "start": "2022-10-01",
              "end": "2023-09-30",
              "val": -1900000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2023"
            },
            {
              "start": "2023-10-01",
              "end": "2024-09-30",
              "val": 5100000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14"
            },
            {
              "start": "2023-10-01",
              "end": "2024-09-30",
              "val": 5100000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2024"
            },
            {
              "start": "2024-10-01",
              "end": "2025-09-30",
              "val": 2600000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2025"
            }
          ]
        }
      },
      "DefinedBenefitPlanActuarialGainLoss": {
        "label": "Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)",
        "description": "Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.",
        "units": {
          "USD": [
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": -23173000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 11302000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 11302000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2013"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": -33295000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": -33295000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2014"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": -3594000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": -3594000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2015"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": -10556000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016"
            }
          ]
        }
      },
      "DefinedBenefitPlanActuarialNetGainsLosses": {
        "label": "Defined Benefit Plan, Actuarial Net (Gains) Losses (Deprecated 2012-01-31)",
        "description": "The net increase or decrease of changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.",
        "units": {
          "USD": [
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": 16934000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 2051000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 2051000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 23173000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012"
            }
          ]
        }
      },
      "DefinedBenefitPlanAmortizationOfGainsLosses": {
        "label": "Defined Benefit Plan, Amortization of Gain (Loss)",
        "description": "Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.",
        "units": {
          "USD": [
            {
              "start": "2013-10-01",
              "end": "2014-03-29",
              "val": 1600000,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06"
            },
            {
              "start": "2013-10-01",
              "end": "2014-06-28",
              "val": 2500000,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-08-05"
            }
          ]
        }
      },
      "DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear": {
        "label": "Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year (Deprecated 2017-01-31)",
        "description": "Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation).",
        "units": {
          "USD": [
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 3400000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016"
            }
          ]
        }
      },
      "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostWeightedAverageInterestCreditingRate": {
        "label": "Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate",
        "description": "Weighted-average interest crediting rate used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, cash balance and other defined benefit plans with promised interest crediting rate.",
        "units": {
          "pure": [
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": 0.06,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020"
            },
            {
              "start": "2020-10-01",
              "end": "2021-09-30",
              "val": 0.06,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22",
              "frame": "CY2021"
            },
            {
              "start": "2021-10-01",
              "end": "2022-09-30",
              "val": 0.041,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2022"
            },
            {
              "start": "2022-10-01",
              "end": "2023-09-30",
              "val": 0.042,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2023"
            },
            {
              "start": "2023-10-01",
              "end": "2024-09-30",
              "val": 0.043,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14",
              "frame": "CY2024"
            },
            {
              "start": "2024-10-01",
              "end": "2025-09-30",
              "val": 0.047,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2025"
            }
          ]
        }
      },
      "DefinedBenefitPlanBenefitObligation": {
        "label": "Defined Benefit Plan, Benefit Obligation",
        "description": "Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.",
        "units": {
          "USD": [
            {
              "end": "2009-09-30",
              "val": 153491000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2010-09-30",
              "val": 172386000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "end": "2010-09-30",
              "val": 172386000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2011-09-30",
              "val": 179027000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "end": "2011-09-30",
              "val": 179027000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "end": "2011-09-30",
              "val": 179027000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 201109000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "end": "2012-09-30",
              "val": 201109000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
              "end": "2012-09-30",
              "val": 201109000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 188334000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
              "end": "2013-09-30",
              "val": 188334000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "end": "2013-09-30",
              "val": 188334000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 218559000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "end": "2014-09-30",
              "val": 218559000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "end": "2014-09-30",
              "val": 218559000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 78188000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "end": "2015-09-30",
              "val": 78188000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 92695000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016Q3I"
            }
          ]
        }
      },
      "DefinedBenefitPlanBenefitsPaid": {
        "label": "Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)",
        "description": "The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.",
        "units": {
          "USD": [
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": -5524000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": -5612000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 5612000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 9306000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 9306000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 10316000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 10316000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2013"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 6477000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 6477000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2014"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 7183000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 7183000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2015"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 1600000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016"
            }
          ]
        }
      },
      "DefinedBenefitPlanContributionsByEmployer": {
        "label": "Defined Benefit Plan, Plan Assets, Contributions by Employer",
        "description": "Amount of contribution received by defined benefit plan from employer which increases plan assets.",
        "units": {
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              "end": "2010-09-30",
              "val": 9211000,
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              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 2206000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 2206000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 7666000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 7666000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012"
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            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 9969000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 9969000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 9969000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2013"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 12905000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 12905000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
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              "end": "2014-09-30",
              "val": 12900000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2014"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 46700000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 46700000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 46700000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2015"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 1978000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 2000000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 2000000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2016"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 2000000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 2000000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 2000000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18",
              "frame": "CY2017"
            },
            {
              "start": "2017-10-01",
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              "val": 2500000,
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              "form": "10-K",
              "filed": "2018-11-16"
            },
            {
              "start": "2017-10-01",
              "end": "2018-09-30",
              "val": 2500000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
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              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "start": "2017-10-01",
              "end": "2018-09-30",
              "val": 2500000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
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              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2018"
            },
            {
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              "val": 2600000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 2600000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
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              "end": "2019-09-30",
              "val": 2600000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
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              "filed": "2021-11-22",
              "frame": "CY2019"
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            {
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              "val": 2600000,
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              "fy": 2020,
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              "filed": "2020-11-20"
            },
            {
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              "val": 2600000,
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              "form": "10-K",
              "filed": "2021-11-22"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": 2600000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2020"
            },
            {
              "start": "2020-10-01",
              "end": "2021-09-30",
              "val": 3000000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22"
            },
            {
              "start": "2020-10-01",
              "end": "2021-09-30",
              "val": 3000000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15"
            },
            {
              "start": "2020-10-01",
              "end": "2021-09-30",
              "val": 3000000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2021"
            },
            {
              "start": "2021-10-01",
              "end": "2022-09-30",
              "val": 3000000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15"
            },
            {
              "start": "2021-10-01",
              "end": "2022-09-30",
              "val": 3000000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20"
            },
            {
              "start": "2021-10-01",
              "end": "2022-09-30",
              "val": 3000000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14",
              "frame": "CY2022"
            },
            {
              "start": "2022-10-01",
              "end": "2023-09-30",
              "val": 1300000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20"
            },
            {
              "start": "2022-10-01",
              "end": "2023-09-30",
              "val": 1300000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14"
            },
            {
              "start": "2022-10-01",
              "end": "2023-09-30",
              "val": 1300000,
              "accn": "0001193125-25-291326",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2023"
            },
            {
              "start": "2023-10-01",
              "end": "2024-09-30",
              "val": 3700000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14"
            },
            {
              "start": "2023-10-01",
              "end": "2024-09-30",
              "val": 3700000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2024"
            },
            {
              "start": "2024-10-01",
              "end": "2025-09-30",
              "val": 3200000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2025"
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          ]
        }
      },
      "DefinedBenefitPlanContributionsByPlanParticipants": {
        "label": "Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)",
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              "frame": "CY2010"
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            {
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              "val": 445000,
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              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 445000,
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              "fy": 2012,
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            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 421000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 421000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 432000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
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            {
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              "end": "2013-09-30",
              "val": 432000,
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              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2013"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 325000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 325000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2014"
            },
            {
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              "end": "2015-09-30",
              "val": 198000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
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              "end": "2015-09-30",
              "val": 198000,
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              "fy": 2016,
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              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2015"
            },
            {
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              "end": "2016-09-30",
              "val": 147000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016"
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          ]
        }
      },
      "DefinedBenefitPlanCurtailments": {
        "label": "Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment",
        "description": "Amount of (increase) decrease in benefit obligation of defined benefit plan from event reducing expected years of future service of present employees or eliminating accrual of benefits for some or all future services of present employees.",
        "units": {
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              "end": "2012-03-31",
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            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 1200000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
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              "form": "10-Q",
              "filed": "2012-07-30"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 1200000,
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              "fy": 2012,
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              "filed": "2012-11-16",
              "frame": "CY2012Q1"
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            {
              "start": "2011-10-01",
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              "val": 0,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": -1608000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
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              "end": "2013-09-30",
              "val": 1608000,
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              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2013"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 0,
              "accn": "0000857005-14-000032",
              "fy": 2014,
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              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedAmortizationNextFiscalYear": {
        "label": "Defined Benefit Plan, Expected Amortization, Next Fiscal Year",
        "description": "Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.",
        "units": {
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              "val": 2100000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 2400000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 3800000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18",
              "frame": "CY2019Q3I"
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          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years",
        "description": "Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.",
        "units": {
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              "end": "2012-09-30",
              "val": 59335000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 21557000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 19827000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2020-09-30",
              "val": 23538000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2021-09-30",
              "val": 24407000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22",
              "frame": "CY2021Q3I"
            },
            {
              "end": "2022-09-30",
              "val": 20680000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2023-09-30",
              "val": 23443000,
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              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2023Q3I"
            },
            {
              "end": "2024-09-30",
              "val": 25551000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14",
              "frame": "CY2024Q3I"
            },
            {
              "end": "2025-09-30",
              "val": 27064000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2025Q3I"
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          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInFiveFiscalYearsThereafter": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter (Deprecated 2012-01-31)",
        "description": "The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).",
        "units": {
          "USD": [
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              "end": "2011-09-30",
              "val": 50595000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
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            {
              "end": "2012-09-30",
              "val": 55471000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFive": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Five (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 5.",
        "units": {
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            {
              "end": "2011-09-30",
              "val": 7743000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
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            {
              "end": "2012-09-30",
              "val": 8332000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
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          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFour": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Four (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 4.",
        "units": {
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              "end": "2011-09-30",
              "val": 7125000,
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              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
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            {
              "end": "2012-09-30",
              "val": 7783000,
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
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          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearOne": {
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        "description": "The amount of the benefits expected to be paid in Year 1.",
        "units": {
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              "end": "2011-09-30",
              "val": 5692000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
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            {
              "end": "2012-09-30",
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
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      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearThree": {
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              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
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            {
              "end": "2012-09-30",
              "val": 7161000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
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          ]
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      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearTwo": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Two (Deprecated 2012-01-31)",
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              "end": "2011-09-30",
              "val": 6065000,
              "accn": "0001193125-11-320097",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
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            {
              "end": "2012-09-30",
              "val": 6593000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
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          ]
        }
      },
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        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year One",
        "description": "Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.",
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              "end": "2012-09-30",
              "val": 6625000,
              "accn": "0000857005-13-000038",
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              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012Q3I"
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            {
              "end": "2014-09-30",
              "val": 136486000,
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              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
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            {
              "end": "2015-09-30",
              "val": 1714000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
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            {
              "end": "2020-09-30",
              "val": 3813000,
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              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2021-09-30",
              "val": 4297000,
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              "form": "10-K",
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            {
              "end": "2022-09-30",
              "val": 3410000,
              "accn": "0000950170-22-025211",
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            {
              "end": "2023-09-30",
              "val": 4158000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2023Q3I"
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            {
              "end": "2024-09-30",
              "val": 4344000,
              "accn": "0000950170-24-127231",
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              "form": "10-K",
              "filed": "2024-11-14",
              "frame": "CY2024Q3I"
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            {
              "end": "2025-09-30",
              "val": 4402000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2025Q3I"
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          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Five",
        "description": "Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.",
        "units": {
          "USD": [
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              "end": "2012-09-30",
              "val": 9147000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 2837000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 2906000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2020-09-30",
              "val": 4651000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2021-09-30",
              "val": 4638000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22",
              "frame": "CY2021Q3I"
            },
            {
              "end": "2022-09-30",
              "val": 4216000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2023-09-30",
              "val": 4694000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2023Q3I"
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            {
              "end": "2024-09-30",
              "val": 4947000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14",
              "frame": "CY2024Q3I"
            },
            {
              "end": "2025-09-30",
              "val": 5209000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2025Q3I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Four",
        "description": "Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.",
        "units": {
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              "end": "2012-09-30",
              "val": 8281000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 2558000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 2624000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2020-09-30",
              "val": 4822000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2021-09-30",
              "val": 4558000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22",
              "frame": "CY2021Q3I"
            },
            {
              "end": "2022-09-30",
              "val": 3830000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2023-09-30",
              "val": 4485000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2023Q3I"
            },
            {
              "end": "2024-09-30",
              "val": 4913000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14",
              "frame": "CY2024Q3I"
            },
            {
              "end": "2025-09-30",
              "val": 5164000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2025Q3I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Three",
        "description": "Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.",
        "units": {
          "USD": [
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              "end": "2012-09-30",
              "val": 7645000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 2139000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 2204000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2020-09-30",
              "val": 4133000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2021-09-30",
              "val": 4860000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
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              "form": "10-K",
              "filed": "2021-11-22",
              "frame": "CY2021Q3I"
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            {
              "end": "2022-09-30",
              "val": 3793000,
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              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2023-09-30",
              "val": 3898000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2023Q3I"
            },
            {
              "end": "2024-09-30",
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              "accn": "0000950170-24-127231",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14",
              "frame": "CY2024Q3I"
            },
            {
              "end": "2025-09-30",
              "val": 5061000,
              "accn": "0001193125-25-291326",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2025Q3I"
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          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Two",
        "description": "Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.",
        "units": {
          "USD": [
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              "end": "2012-09-30",
              "val": 7071000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 2040000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 1810000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2020-09-30",
              "val": 4321000,
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              "fy": 2020,
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              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2021-09-30",
              "val": 4216000,
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              "frame": "CY2021Q3I"
            },
            {
              "end": "2022-09-30",
              "val": 4068000,
              "accn": "0000950170-22-025211",
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              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2023-09-30",
              "val": 3782000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2023Q3I"
            },
            {
              "end": "2024-09-30",
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              "accn": "0000950170-24-127231",
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              "form": "10-K",
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              "frame": "CY2024Q3I"
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            {
              "end": "2025-09-30",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2025Q3I"
            }
          ]
        }
      },
      "DefinedBenefitPlanFairValueOfPlanAssets": {
        "label": "Defined Benefit Plan, Plan Assets, Amount",
        "description": "Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.",
        "units": {
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              "accn": "0001193125-11-320097",
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              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2010-09-30",
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              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "end": "2010-09-30",
              "val": 115120000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2010Q3I"
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            {
              "end": "2011-09-30",
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              "accn": "0001193125-11-320097",
              "fy": 2011,
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              "filed": "2011-11-23"
            },
            {
              "end": "2011-09-30",
              "val": 110781000,
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              "fy": 2012,
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              "filed": "2012-11-16"
            },
            {
              "end": "2011-09-30",
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              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 124833000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
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              "filed": "2016-11-18",
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              "form": "10-K",
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              "end": "2011-09-30",
              "val": 8009000,
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              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2011"
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2012-11-16"
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            {
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              "val": 8044000,
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              "form": "10-K",
              "filed": "2013-11-22",
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            {
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              "end": "2013-09-30",
              "val": 7373000,
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              "filed": "2013-11-22"
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              "filed": "2014-11-26"
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              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2014"
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              "val": 6419000,
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              "form": "10-K",
              "filed": "2015-11-23"
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              "filed": "2016-11-18",
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            },
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              "val": 1374000,
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              "filed": "2016-11-18",
              "frame": "CY2016"
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              "end": "2011-09-30",
              "val": -73000,
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              "filed": "2012-11-16",
              "frame": "CY2011"
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012"
            }
          ]
        }
      },
      "DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1": {
        "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement",
        "description": "Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.",
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              "val": 0,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2013"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 0,
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              "fy": 2015,
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              "form": "10-K",
              "filed": "2015-11-23"
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              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 0,
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              "form": "10-K",
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              "end": "2015-09-30",
              "val": -66332000,
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              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
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              "filed": "2016-11-18"
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              "val": -66332000,
              "accn": "0000857005-17-000021",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2015"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 0,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
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            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 0,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2016"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 0,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2017"
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          ]
        }
      },
      "DefinedBenefitPlanServiceCost": {
        "label": "Defined Benefit Plan, Service Cost",
        "description": "Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.",
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              "end": "2010-09-30",
              "val": 1563000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2010"
            },
            {
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              "end": "2011-09-30",
              "val": 1782000,
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              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 1782000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 1882000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 1882000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 2017000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 2017000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2013"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 1659000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 1659000,
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              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2014"
            },
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              "end": "2015-09-30",
              "val": 1466000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 1466000,
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              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2015"
            },
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              "end": "2016-09-30",
              "val": 1599000,
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              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016"
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      },
      "DefinedBenefitPlanSettlementsBenefitObligation": {
        "label": "Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement",
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        "units": {
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              "val": 0,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2014"
            },
            {
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              "end": "2015-09-30",
              "val": 135350000,
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              "fy": 2015,
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              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
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              "end": "2015-09-30",
              "val": 135350000,
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              "form": "10-K",
              "filed": "2016-11-18",
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              "fy": 2016,
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              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016"
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      },
      "DefinedBenefitPlanSettlementsPlanAssets": {
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        "units": {
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              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 0,
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              "filed": "2015-11-23",
              "frame": "CY2014"
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              "fy": 2015,
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              "form": "10-K",
              "filed": "2015-11-23"
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              "fy": 2016,
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              "filed": "2016-11-18",
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              "val": 0,
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              "fy": 2016,
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              "form": "10-K",
              "filed": "2016-11-18",
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        "label": "Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Securities (Deprecated 2012-01-31)",
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              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011"
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      "DefinedBenefitPlanTargetPlanAssetAllocations": {
        "label": "Defined Benefit Plan, Target Plan Asset Allocations (Deprecated 2017-01-31)",
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              "filed": "2014-11-26"
            },
            {
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              "end": "2013-09-30",
              "val": 0.4,
              "accn": "0000857005-15-000007",
              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-02-10"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 0.4,
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              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-05-11",
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              "val": 1,
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              "fy": 2014,
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              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
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              "val": 1,
              "accn": "0000857005-15-000007",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-02-10"
            },
            {
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              "end": "2014-09-30",
              "val": 1,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11",
              "frame": "CY2014"
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          ]
        }
      },
      "Depreciation": {
        "label": "Depreciation",
        "description": "The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.",
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              "end": "2009-09-30",
              "val": 26300000,
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              "filed": "2011-11-23",
              "frame": "CY2009"
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              "fy": 2011,
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              "form": "10-K",
              "filed": "2011-11-23"
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            {
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              "val": 28200000,
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2010"
            },
            {
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              "end": "2011-09-30",
              "val": 28700000,
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              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
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            {
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2012-11-16"
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              "val": 28700000,
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              "fy": 2013,
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              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2011"
            },
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              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
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              "fy": 2013,
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              "form": "10-K",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2012"
            },
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              "fy": 2013,
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              "fy": 2015,
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              "form": "10-K",
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              "val": 27100000,
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              "fy": 2014,
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              "filed": "2014-11-26"
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              "accn": "0000857005-15-000042",
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              "filed": "2015-11-23"
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              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2014"
            },
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              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
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              "end": "2015-09-30",
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              "filed": "2017-11-29",
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            },
            {
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              "accn": "0000857005-16-000071",
              "fy": 2016,
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              "filed": "2016-11-18"
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            {
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              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29"
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            {
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              "end": "2016-09-30",
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              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2016"
            },
            {
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              "end": "2017-09-30",
              "val": 28000000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
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              "form": "10-K",
              "filed": "2017-11-29"
            },
            {
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              "val": 28000000,
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              "filed": "2018-11-16"
            },
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              "end": "2017-09-30",
              "val": 28000000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18",
              "frame": "CY2017"
            },
            {
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              "end": "2018-09-30",
              "val": 29400000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16"
            },
            {
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              "end": "2018-09-30",
              "val": 29400000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
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              "end": "2018-09-30",
              "val": 29400000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2018"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 26700000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 26700000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 26700000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22",
              "frame": "CY2019"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": 24700000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
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              "end": "2014-06-28",
              "val": 746000,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-08-05"
            },
            {
              "start": "2014-03-30",
              "end": "2014-06-28",
              "val": 746000,
              "accn": "0000857005-15-000028",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-08-11",
              "frame": "CY2014Q2"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 4500000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 4500000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 4500000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2014"
            },
            {
              "start": "2014-10-01",
              "end": "2015-01-03",
              "val": 237000,
              "accn": "0000857005-15-000007",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-02-10",
              "frame": "CY2014Q4"
            },
            {
              "start": "2014-10-01",
              "end": "2015-04-04",
              "val": 912000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11"
            },
            {
              "start": "2015-01-04",
              "end": "2015-04-04",
              "val": 675000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11",
              "frame": "CY2015Q1"
            },
            {
              "start": "2014-10-01",
              "end": "2015-07-04",
              "val": 1362000,
              "accn": "0000857005-15-000028",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-08-11"
            },
            {
              "start": "2015-04-05",
              "end": "2015-07-04",
              "val": 449000,
              "accn": "0000857005-15-000028",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-08-11",
              "frame": "CY2015Q2"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 2700000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 2700000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 2700000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2015"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 1900000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 1900000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 1900000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2016"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 5700000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 5700000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 5700000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18",
              "frame": "CY2017"
            },
            {
              "start": "2017-10-01",
              "end": "2018-09-30",
              "val": 7000000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16"
            },
            {
              "start": "2017-10-01",
              "end": "2018-09-30",
              "val": 7000000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "start": "2017-10-01",
              "end": "2018-09-30",
              "val": 7000000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2018"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 3200000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 3200000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 3200000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22",
              "frame": "CY2019"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": 1700000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": 1700000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": 1700000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2020"
            },
            {
              "start": "2020-10-01",
              "end": "2021-09-30",
              "val": 8000000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22"
            },
            {
              "start": "2020-10-01",
              "end": "2021-09-30",
              "val": 8000000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15"
            },
            {
              "start": "2020-10-01",
              "end": "2021-09-30",
              "val": 8000000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2021"
            },
            {
              "start": "2021-10-01",
              "end": "2022-09-30",
              "val": 900000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15"
            },
            {
              "start": "2021-10-01",
              "end": "2022-09-30",
              "val": 900000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2022"
            },
            {
              "start": "2022-10-01",
              "end": "2023-09-30",
              "val": 2100000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2023"
            }
          ]
        }
      },
      "FurnitureAndFixturesGross": {
        "label": "Furniture and Fixtures, Gross",
        "description": "Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.",
        "units": {
          "USD": [
            {
              "end": "2010-09-30",
              "val": 18557000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2011-09-30",
              "val": 20608000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "end": "2011-09-30",
              "val": 20608000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 20878000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "end": "2012-09-30",
              "val": 20878000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 19211000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
              "end": "2013-09-30",
              "val": 19211000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 19025000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "end": "2014-09-30",
              "val": 19025000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 18370000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "end": "2015-09-30",
              "val": 18370000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 20742000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18"
            },
            {
              "end": "2016-09-30",
              "val": 20742000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 21145000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29"
            },
            {
              "end": "2017-09-30",
              "val": 21145000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 20737000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16"
            },
            {
              "end": "2018-09-30",
              "val": 20737000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 28445000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "end": "2019-09-30",
              "val": 28445000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2020-09-30",
              "val": 30251000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
              "end": "2020-09-30",
              "val": 30251000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2021-09-30",
              "val": 30568000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-22"
            },
            {
              "end": "2021-09-30",
              "val": 30568000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2021Q3I"
            },
            {
              "end": "2022-09-30",
              "val": 29744000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15"
            },
            {
              "end": "2022-09-30",
              "val": 29744000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2023-09-30",
              "val": 20042000,
              "accn": "0000950123-23-011049",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-20"
            },
            {
              "end": "2023-09-30",
              "val": 20042000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14",
              "frame": "CY2023Q3I"
            },
            {
              "end": "2024-09-30",
              "val": 20177000,
              "accn": "0000950170-24-127231",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-14"
            },
            {
              "end": "2024-09-30",
              "val": 20177000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2024Q3I"
            },
            {
              "end": "2025-09-30",
              "val": 18341000,
              "accn": "0001193125-25-291326",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-21",
              "frame": "CY2025Q3I"
            }
          ]
        }
      },
      "FutureAmortizationExpenseAfterYearFive": {
        "label": "Future Amortization Expense, after Year Five (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized for the remainder of the finite-lived intangible asset useful life after the fifth succeeding fiscal year.",
        "units": {
          "USD": [
            {
              "start": "2010-10-01",
              "end": "2011-07-02",
              "val": 59900000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 42200000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2011Q4"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 42600000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 42100000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 42600000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012"
            }
          ]
        }
      },
      "FutureAmortizationExpenseRemainderOfFiscalYear": {
        "label": "Future Amortization Expense, Remainder of Fiscal Year (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during the remainder of the current fiscal year.",
        "units": {
          "USD": [
            {
              "start": "2010-10-01",
              "end": "2011-07-02",
              "val": 10200000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 26900000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2011Q4"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 18100000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 8800000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2"
            }
          ]
        }
      },
      "FutureAmortizationExpenseYearFive": {
        "label": "Future Amortization Expense, Year Five (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during year five of the five succeeding fiscal years.",
        "units": {
          "USD": [
            {
              "start": "2010-10-01",
              "end": "2011-07-02",
              "val": 22000000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 23100000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 19400000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2011Q4"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 19600000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 19300000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 19500000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012"
            }
          ]
        }
      },
      "FutureAmortizationExpenseYearFour": {
        "label": "Future Amortization Expense, Year Four (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during year four of the five succeeding fiscal years.",
        "units": {
          "USD": [
            {
              "start": "2010-10-01",
              "end": "2011-07-02",
              "val": 30100000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 30500000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 23000000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2011Q4"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 23200000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 22900000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 23100000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012"
            }
          ]
        }
      },
      "FutureAmortizationExpenseYearOne": {
        "label": "Future Amortization Expense, Year One (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years.",
        "units": {
          "USD": [
            {
              "start": "2010-10-01",
              "end": "2011-07-02",
              "val": 36300000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 36500000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 36000000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2011Q4"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 36400000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 35700000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 36000000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012"
            }
          ]
        }
      },
      "FutureAmortizationExpenseYearThree": {
        "label": "Future Amortization Expense, Year Three (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during year three of the five succeeding fiscal years.",
        "units": {
          "USD": [
            {
              "start": "2010-10-01",
              "end": "2011-07-02",
              "val": 33700000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 34100000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 30500000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2011Q4"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 30800000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 30400000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 30600000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012"
            }
          ]
        }
      },
      "FutureAmortizationExpenseYearTwo": {
        "label": "Future Amortization Expense, Year Two (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during year two of the five succeeding fiscal years.",
        "units": {
          "USD": [
            {
              "start": "2010-10-01",
              "end": "2011-07-02",
              "val": 36000000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 36300000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 33900000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2011Q4"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 34300000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 33800000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 34100000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012"
            }
          ]
        }
      },
      "GainLossOnDispositionOfAssets1": {
        "label": "Gain (Loss) on Disposition of Assets",
        "description": "Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.",
        "units": {
          "USD": [
            {
              "start": "2016-10-01",
              "end": "2017-04-01",
              "val": 0,
              "accn": "0000857005-18-000008",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-05-02"
            },
            {
              "start": "2017-10-01",
              "end": "2018-03-31",
              "val": -22000,
              "accn": "0000857005-18-000008",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-05-02"
            },
            {
              "start": "2017-10-01",
              "end": "2018-03-31",
              "val": -22000,
              "accn": "0000857005-19-000011",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-05-09"
            },
            {
              "start": "2018-10-01",
              "end": "2019-03-30",
              "val": -32000,
              "accn": "0000857005-19-000011",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-05-09"
            },
            {
              "start": "2018-10-01",
              "end": "2019-03-30",
              "val": -32000,
              "accn": "0000857005-20-000017",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-06"
            },
            {
              "start": "2019-10-01",
              "end": "2020-03-28",
              "val": -231000,
              "accn": "0000857005-20-000017",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-06"
            }
          ]
        }
      },
      "GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments": {
        "label": "Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments",
        "description": "Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.",
        "units": {
          "USD": [
            {
              "start": "2008-10-01",
              "end": "2009-09-30",
              "val": 3000000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2009"
            },
            {
              "start": "2009-10-01",
              "end": "2010-07-03",
              "val": -3294000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10"
            },
            {
              "start": "2010-04-04",
              "end": "2010-07-03",
              "val": -1807000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10",
              "frame": "CY2010Q2"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": 1800000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": -1800000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
              "end": "2011-01-01",
              "val": 1300000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2010Q4"
            },
            {
              "start": "2010-10-01",
              "end": "2011-04-02",
              "val": 5200000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09"
            },
            {
              "start": "2011-01-02",
              "end": "2011-04-02",
              "val": 6500000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2011Q1"
            },
            {
              "start": "2010-10-01",
              "end": "2011-07-02",
              "val": 12897000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10"
            },
            {
              "start": "2010-10-01",
              "end": "2011-07-02",
              "val": -12897000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30"
            },
            {
              "start": "2011-04-03",
              "end": "2011-07-02",
              "val": 7684000,
              "accn": "0001193125-11-218270",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-08-10"
            },
            {
              "start": "2011-04-03",
              "end": "2011-07-02",
              "val": -7684000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2011Q2"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 4100000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": -4100000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": -4100000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": -700000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": -721000,
              "accn": "0000857005-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-02-06",
              "frame": "CY2011Q4"
            },
            {
              "start": "2011-10-01",
              "end": "2012-03-31",
              "val": -2400000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09"
            },
            {
              "start": "2011-10-01",
              "end": "2012-03-31",
              "val": 2387000,
              "accn": "0000857005-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-05-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": -1700000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": -1666000,
              "accn": "0000857005-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2011-10-01",
              "end": "2012-06-30",
              "val": -816000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30"
            },
            {
              "start": "2011-10-01",
              "end": "2012-06-30",
              "val": -816000,
              "accn": "0000857005-13-000026",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-08-07"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 1570000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 1570000,
              "accn": "0000857005-13-000026",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-08-07",
              "frame": "CY2012Q2"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": -3600000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": -3600000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": -3600000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2012"
            },
            {
              "start": "2012-10-01",
              "end": "2012-12-29",
              "val": 702000,
              "accn": "0000857005-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-02-06"
            },
            {
              "start": "2012-10-01",
              "end": "2012-12-29",
              "val": 702000,
              "accn": "0000857005-14-000004",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-02-04",
              "frame": "CY2012Q4"
            },
            {
              "start": "2012-10-01",
              "end": "2013-03-30",
              "val": -3596000,
              "accn": "0000857005-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-05-08"
            },
            {
              "start": "2012-10-01",
              "end": "2013-03-30",
              "val": 3596000,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06"
            },
            {
              "start": "2012-12-30",
              "end": "2013-03-30",
              "val": 2894000,
              "accn": "0000857005-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-05-08"
            },
            {
              "start": "2012-12-30",
              "end": "2013-03-30",
              "val": 2894000,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06",
              "frame": "CY2013Q1"
            },
            {
              "start": "2012-10-01",
              "end": "2013-06-29",
              "val": 5039000,
              "accn": "0000857005-13-000026",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-08-07"
            },
            {
              "start": "2012-10-01",
              "end": "2013-06-29",
              "val": 5039000,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
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            {
              "start": "2011-10-01",
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              "val": 348394000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
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              "filed": "2012-11-16"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 348394000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
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            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 348394000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2012"
            },
            {
              "start": "2012-10-01",
              "end": "2012-12-29",
              "val": 79185000,
              "accn": "0000857005-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-02-06"
            },
            {
              "start": "2012-10-01",
              "end": "2012-12-29",
              "val": 79185000,
              "accn": "0000857005-14-000004",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-02-04",
              "frame": "CY2012Q4"
            },
            {
              "start": "2012-10-01",
              "end": "2013-03-30",
              "val": 158875000,
              "accn": "0000857005-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-05-08"
            },
            {
              "start": "2012-10-01",
              "end": "2013-03-30",
              "val": 158875000,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06"
            },
            {
              "start": "2012-12-30",
              "end": "2013-03-30",
              "val": 79690000,
              "accn": "0000857005-13-000018",
              "fy": 2013,
              "fp": "Q2",
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            },
            {
              "start": "2012-12-30",
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              "val": 79690000,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
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            },
            {
              "start": "2012-10-01",
              "end": "2013-06-29",
              "val": 238777000,
              "accn": "0000857005-13-000026",
              "fy": 2013,
              "fp": "Q3",
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            {
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              "accn": "0000857005-13-000026",
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            {
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              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
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            },
            {
              "start": "2012-10-01",
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              "val": 344209000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
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            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 344209000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 354282000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
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            },
            {
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              "val": 79192000,
              "accn": "0000857005-14-000004",
              "fy": 2014,
              "fp": "Q1",
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            },
            {
              "start": "2013-10-01",
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              "val": 82866000,
              "accn": "0000857005-15-000007",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-02-10",
              "frame": "CY2013Q4"
            },
            {
              "start": "2013-10-01",
              "end": "2014-03-29",
              "val": 164411000,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06"
            },
            {
              "start": "2013-10-01",
              "end": "2014-03-29",
              "val": 171411000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11"
            },
            {
              "start": "2013-12-29",
              "end": "2014-03-29",
              "val": 85218000,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06"
            },
            {
              "start": "2013-12-29",
              "end": "2014-03-29",
              "val": 88545000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
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              "frame": "CY2014Q1"
            },
            {
              "start": "2013-10-01",
              "end": "2014-06-28",
              "val": 257118000,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
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            },
            {
              "start": "2013-10-01",
              "end": "2014-06-28",
              "val": 269114000,
              "accn": "0000857005-15-000028",
              "fy": 2015,
              "fp": "Q3",
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            {
              "start": "2014-03-30",
              "end": "2014-06-28",
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              "accn": "0000857005-14-000018",
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            },
            {
              "start": "2014-03-30",
              "end": "2014-06-28",
              "val": 97703000,
              "accn": "0000857005-15-000028",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-08-11",
              "frame": "CY2014Q2"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 369691000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 389739000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
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              "filed": "2015-11-23",
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            },
            {
              "start": "2014-10-01",
              "end": "2015-01-03",
              "val": 78971000,
              "accn": "0000857005-15-000007",
              "fy": 2015,
              "fp": "Q1",
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              "frame": "CY2014Q4"
            },
            {
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              "end": "2015-04-04",
              "val": 164923000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11"
            },
            {
              "start": "2015-01-04",
              "end": "2015-04-04",
              "val": 85952000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11",
              "frame": "CY2015Q1"
            },
            {
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              "val": 248850000,
              "accn": "0000857005-15-000028",
              "fy": 2015,
              "fp": "Q3",
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              "filed": "2015-08-11"
            },
            {
              "start": "2015-04-05",
              "end": "2015-07-04",
              "val": 83926000,
              "accn": "0000857005-15-000028",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
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              "frame": "CY2015Q2"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 347999000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015"
            }
          ]
        }
      },
      "LineOfCredit": {
        "label": "Long-term Line of Credit",
        "description": "The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.",
        "units": {
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              "val": 530600000,
              "accn": "0000857005-15-000021",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-05-11",
              "frame": "CY2015Q1I"
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            {
              "end": "2015-09-30",
              "val": 668100000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23"
            },
            {
              "end": "2015-09-30",
              "val": 618125000,
              "accn": "0000857005-16-000068",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-08-11"
            },
            {
              "end": "2015-09-30",
              "val": 618125000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2015Q3I"
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            {
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              "val": 758125000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016Q3I"
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          ]
        }
      },
      "LineOfCreditFacilityAmountOutstanding": {
        "label": "Line of Credit Facility, Amount Outstanding (Deprecated 2014-01-31)",
        "description": "Amount borrowed under the credit facility as of the balance sheet date.",
        "units": {
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              "val": 0,
              "accn": "0001193125-11-218270",
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            },
            {
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              "val": 0,
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              "fy": 2011,
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              "filed": "2011-11-23"
            },
            {
              "end": "2010-09-30",
              "val": 0,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "end": "2010-09-30",
              "val": 0,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22"
            },
            {
              "end": "2010-09-30",
              "val": 0,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2011-09-30",
              "val": 200000000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 370000000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            },
            {
              "end": "2012-09-30",
              "val": 370000000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-29",
              "val": 368100000,
              "accn": "0000857005-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-02-06",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-03-30",
              "val": 308100000,
              "accn": "0000857005-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-05-08",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-29",
              "val": 268100000,
              "accn": "0000857005-13-000026",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-08-07",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 258100000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-28",
              "val": 368100000,
              "accn": "0000857005-14-000004",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-02-04",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-03-29",
              "val": 318100000,
              "accn": "0000857005-14-000010",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-05-06",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-28",
              "val": 315000000,
              "accn": "0000857005-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-08-05",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
              "val": 611900000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-01-03",
              "val": 605600000,
              "accn": "0000857005-15-000007",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-02-10",
              "frame": "CY2014Q4I"
            }
          ]
        }
      },
      "LineOfCreditFacilityDecreaseRepayments": {
        "label": "Line of Credit Facility, Decrease, Repayments (Deprecated 2013-01-31)",
        "description": "Decrease for amounts repaid on the credit facility for the period.",
        "units": {
          "USD": [
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 60000000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2"
            },
            {
              "start": "2012-10-01",
              "end": "2012-12-29",
              "val": 1900000,
              "accn": "0000857005-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-02-06",
              "frame": "CY2012Q4"
            }
          ]
        }
      },
      "LineOfCreditFacilityIncreaseAdditionalBorrowings": {
        "label": "Line of Credit Facility, Increase, Additional Borrowings (Deprecated 2013-01-31)",
        "description": "Increase for additional borrowings on the credit facility during the period.",
        "units": {
          "USD": [
            {
              "start": "2011-10-01",
              "end": "2011-10-24",
              "val": 40000000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 40000000,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2011Q4"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 40000000,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 40000000,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-09-01",
              "end": "2012-09-30",
              "val": 230000000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16"
            }
          ]
        }
      },
      "LineOfCreditFacilityInterestRateAtPeriodEnd": {
        "label": "Line of Credit Facility, Interest Rate at Period End",
        "description": "The effective interest rate at the end of the reporting period.",
        "units": {
          "pure": [
            {
              "end": "2011-12-31",
              "val": 0.0188,
              "accn": "0000857005-12-000005",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-02-08",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-03-31",
              "val": 0.0188,
              "accn": "0000857005-12-000014",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-05-09",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 0.0175,
              "accn": "0000857005-12-000019",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2015-07-04",
              "val": 0.016875,
              "accn": "0000857005-15-000028",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-08-11",
              "frame": "CY2015Q2I"
            }
          ]
        }
      },
      "LineOfCreditFacilityInterestRateDuringPeriod": {
        "label": "Line of Credit Facility, Interest Rate During Period",
        "description": "The effective interest rate during the reporting period.",
        "units": {
          "pure": [
            {
              "start": "2008-10-01",
              "end": "2009-09-30",
              "val": 0.032,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2009"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": 0.016,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": 0.016,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
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      },
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        "description": "The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.",
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              "filed": "2020-01-27"
            },
            {
              "end": "2019-09-30",
              "val": 312811000,
              "accn": "0000857005-20-000017",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-06"
            },
            {
              "end": "2019-09-30",
              "val": 312811000,
              "accn": "0001564590-20-036779",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-05"
            },
            {
              "end": "2019-09-30",
              "val": 312811000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2019Q3I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueCurrent": {
        "label": "Operating Leases, Future Minimum Payments Due, Next Twelve Months",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-09-30",
              "val": 38546000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 43088000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 40870000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 40233000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 35829000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 39994000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 39261000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 38690000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 31868000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "end": "2019-09-30",
              "val": 31868000,
              "accn": "0000857005-20-000009",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-01-27"
            },
            {
              "end": "2019-09-30",
              "val": 31868000,
              "accn": "0000857005-20-000017",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-06"
            },
            {
              "end": "2019-09-30",
              "val": 31868000,
              "accn": "0001564590-20-036779",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-05"
            },
            {
              "end": "2019-09-30",
              "val": 31868000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2019Q3I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInFiveYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Five Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-09-30",
              "val": 16896000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 17042000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 18972000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 16594000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 15033000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 14943000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 24018000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 18336000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 16909000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "end": "2019-09-30",
              "val": 16909000,
              "accn": "0000857005-20-000009",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-01-27"
            },
            {
              "end": "2019-09-30",
              "val": 16909000,
              "accn": "0000857005-20-000017",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-06"
            },
            {
              "end": "2019-09-30",
              "val": 16909000,
              "accn": "0001564590-20-036779",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-05"
            },
            {
              "end": "2019-09-30",
              "val": 16909000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2019Q3I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInFourYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Four Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-09-30",
              "val": 21765000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 22156000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 22463000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 20203000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 18242000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 22804000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 28134000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 28248000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 19279000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "end": "2019-09-30",
              "val": 19279000,
              "accn": "0000857005-20-000009",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-01-27"
            },
            {
              "end": "2019-09-30",
              "val": 19279000,
              "accn": "0000857005-20-000017",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-06"
            },
            {
              "end": "2019-09-30",
              "val": 19279000,
              "accn": "0001564590-20-036779",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-05"
            },
            {
              "end": "2019-09-30",
              "val": 19279000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2019Q3I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInThreeYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Three Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-09-30",
              "val": 25378000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 28221000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 28165000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 23974000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 21705000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 27150000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 25941000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 33109000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 25624000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "end": "2019-09-30",
              "val": 25624000,
              "accn": "0000857005-20-000009",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-01-27"
            },
            {
              "end": "2019-09-30",
              "val": 25624000,
              "accn": "0000857005-20-000017",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-06"
            },
            {
              "end": "2019-09-30",
              "val": 25624000,
              "accn": "0001564590-20-036779",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-05"
            },
            {
              "end": "2019-09-30",
              "val": 25624000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2019Q3I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInTwoYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Two Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-09-30",
              "val": 30363000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 34430000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 35580000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 32371000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 26582000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 34347000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 30988000,
              "accn": "0000857005-17-000021",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-29",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 33753000,
              "accn": "0000857005-18-000025",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-16",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 33094000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "end": "2019-09-30",
              "val": 33094000,
              "accn": "0000857005-20-000009",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-01-27"
            },
            {
              "end": "2019-09-30",
              "val": 33094000,
              "accn": "0000857005-20-000017",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-06"
            },
            {
              "end": "2019-09-30",
              "val": 33094000,
              "accn": "0001564590-20-036779",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-05"
            },
            {
              "end": "2019-09-30",
              "val": 33094000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2019Q3I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueThereafter": {
        "label": "Operating Leases, Future Minimum Payments, Due Thereafter",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-09-30",
              "val": 80986000,
              "accn": "0001193125-11-320097",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-23",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 71637000,
              "accn": "0000857005-12-000031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-16",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 52762000,
              "accn": "0000857005-13-000038",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-22",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 39191000,
              "accn": "0000857005-14-000032",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-26",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 26698000,
              "accn": "0000857005-15-000042",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 16776000,
              "accn": "0000857005-16-000071",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-18",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 212234000,
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              "filed": "2025-05-01",
              "frame": "CY2025Q1I"
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            {
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              "filed": "2026-02-05"
            },
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            },
            {
              "end": "2025-09-30",
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              "filed": "2026-07-31",
              "frame": "CY2025Q3I"
            },
            {
              "end": "2025-12-31",
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              "form": "10-Q",
              "filed": "2026-02-05",
              "frame": "CY2025Q4I"
            },
            {
              "end": "2026-03-31",
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              "fy": 2026,
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              "filed": "2026-05-07",
              "frame": "CY2026Q1I"
            },
            {
              "end": "2026-06-30",
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              "fy": 2026,
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              "form": "10-Q",
              "filed": "2026-07-31",
              "frame": "CY2026Q2I"
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      },
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              "frame": "CY2008"
            },
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              "end": "2009-09-30",
              "val": 1604000,
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              "form": "10-K",
              "filed": "2010-11-23"
            },
            {
              "start": "2008-10-01",
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              "val": 1604000,
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              "filed": "2013-11-22"
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              "val": -800000,
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              "filed": "2015-11-23"
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              "val": 200000,
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              "filed": "2016-11-18"
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              "val": 200000,
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              "filed": "2017-11-29",
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              "end": "2016-09-30",
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              "accn": "0000857005-16-000071",
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            {
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              "val": 300000,
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              "filed": "2017-11-29"
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              "filed": "2018-11-16"
            },
            {
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              "val": 500000,
              "accn": "0000857005-19-000040",
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              "form": "10-K",
              "filed": "2019-11-18"
            },
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              "val": 500000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2018"
            },
            {
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              "end": "2019-09-30",
              "val": 300000,
              "accn": "0000857005-19-000040",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-18"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 300000,
              "accn": "0001564590-20-054803",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 300000,
              "accn": "0001564590-21-057806",
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              "form": "10-K",
              "filed": "2021-11-22",
              "frame": "CY2019"
            },
            {
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              "val": 0,
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              "fy": 2020,
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              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
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              "filed": "2021-11-22"
            },
            {
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              "val": 0,
              "accn": "0000950170-22-025211",
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            },
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              "val": -200000,
              "accn": "0001564590-21-057806",
              "fy": 2021,
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              "form": "10-K",
              "filed": "2021-11-22"
            },
            {
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              "end": "2021-09-30",
              "val": 200000,
              "accn": "0000950170-22-025211",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15",
              "frame": "CY2021"
            },
            {
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              "val": 500000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-15",
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              "end": "2022-06-30",
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              "end": "2022-06-30",
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