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      "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": [
            {
              "end": "2011-06-30",
              "val": 11882000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationAssetsAcquired": {
        "label": "Business Acquisition, Purchase Price Allocation, Assets Acquired (Deprecated 2013-01-31)",
        "description": "The amount of acquisition cost of a business combination allocated to assets acquired.",
        "units": {
          "USD": [
            {
              "end": "2011-06-30",
              "val": 61114000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationCurrentAssets": {
        "label": "Business Acquisition, Purchase Price Allocation, Current Assets (Deprecated 2013-01-31)",
        "description": "The amount of acquisition cost of a business combination allocated to current assets.",
        "units": {
          "USD": [
            {
              "end": "2011-06-30",
              "val": 14627000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            }
          ]
        }
      },
      "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": {
          "USD": [
            {
              "end": "2011-06-30",
              "val": 1251000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationCurrentAssetsMarketableSecurities": {
        "label": "Business Acquisition, Purchase Price Allocation, Current Assets, Marketable Securities (Deprecated 2013-01-31)",
        "description": "The amount of acquisition cost of a business combination allocated to marketable securities.",
        "units": {
          "USD": [
            {
              "end": "2011-06-30",
              "val": 8463000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationCurrentLiabilities": {
        "label": "Business Acquisition, Purchase Price Allocation, Current Liabilities (Deprecated 2013-01-31)",
        "description": "The amount of acquisition cost of a business combination allocated to current liabilities of the acquired entity.",
        "units": {
          "USD": [
            {
              "end": "2011-06-30",
              "val": 5505000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationGoodwillAmount": {
        "label": "Business Acquisition, Purchase Price Allocation, Goodwill Amount (Deprecated 2013-01-31)",
        "description": "Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.",
        "units": {
          "USD": [
            {
              "end": "2011-06-30",
              "val": 24188000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            }
          ]
        }
      },
      "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": {
          "USD": [
            {
              "end": "2011-06-30",
              "val": 13953000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationNoncurrentLiabilitiesLongTermDebt": {
        "label": "Business Acquisition, Purchase Price Allocation, Noncurrent Liabilities, Long-term Debt (Deprecated 2013-01-31)",
        "description": "The amount of acquisition cost of a business combination allocated to the noncurrent portion of the long-term debt assumed from the acquired entity.",
        "units": {
          "USD": [
            {
              "end": "2009-09-30",
              "val": 18610000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2010-09-30",
              "val": 0,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2011-09-30",
              "val": 0,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011Q3I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationProjectedBenefitObligationAsset": {
        "label": "Business Acquisition, Purchase Price Allocation, Projected Benefit Obligation (Asset) (Deprecated 2013-01-31)",
        "description": "The amount of acquisition cost of a business combination allocated to a liability for the projected benefit obligation in excess of plan assets or an asset for plan assets in excess of the projected benefit obligation of a single-employer defined benefit pension plan.",
        "units": {
          "USD": [
            {
              "end": "2011-06-30",
              "val": 434000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            }
          ]
        }
      },
      "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": {
          "USD": [
            {
              "end": "2011-06-30",
              "val": 1954000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationWarrantyLiability": {
        "label": "Business Acquisition, Purchase Price Allocation, Warranty Liability (Deprecated 2013-01-31)",
        "description": "The amount of acquisition cost of a business combination allocated to warranties assumed from the acquired entity.",
        "units": {
          "USD": [
            {
              "end": "2010-09-30",
              "val": 0,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2011-06-30",
              "val": 2250000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 2250000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-09-30",
              "val": 2250000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16"
            },
            {
              "end": "2013-03-31",
              "val": 157000,
              "accn": "0000108312-13-000010",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-04-23",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "BusinessAcquisitionsProFormaNetIncomeLoss": {
        "label": "Business Acquisition, Pro Forma Net Income (Loss)",
        "description": "The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.",
        "units": {
          "USD": [
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 131384000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2012"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 131412000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14"
            },
            {
              "start": "2012-10-01",
              "end": "2012-12-31",
              "val": 28438000,
              "accn": "0000108312-14-000005",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-01-22",
              "frame": "CY2012Q4"
            },
            {
              "start": "2012-10-01",
              "end": "2013-03-31",
              "val": 73970000,
              "accn": "0000108312-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-04-23"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 45532000,
              "accn": "0000108312-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-04-23",
              "frame": "CY2013Q1"
            },
            {
              "start": "2012-10-01",
              "end": "2013-06-30",
              "val": 98609000,
              "accn": "0000108312-14-000032",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-07-22"
            },
            {
              "start": "2013-04-01",
              "end": "2013-06-30",
              "val": 24639000,
              "accn": "0000108312-14-000032",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-07-22",
              "frame": "CY2013Q2"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 152431000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2013"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 152271000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14"
            },
            {
              "start": "2013-10-01",
              "end": "2013-12-31",
              "val": 23632000,
              "accn": "0000108312-14-000005",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-01-22",
              "frame": "CY2013Q4"
            },
            {
              "start": "2013-10-01",
              "end": "2014-03-31",
              "val": 68770000,
              "accn": "0000108312-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-04-23"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": 45138000,
              "accn": "0000108312-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-04-23",
              "frame": "CY2014Q1"
            },
            {
              "start": "2013-10-01",
              "end": "2014-06-30",
              "val": 115059000,
              "accn": "0000108312-14-000032",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-07-22"
            },
            {
              "start": "2014-04-01",
              "end": "2014-06-30",
              "val": 46289000,
              "accn": "0000108312-14-000032",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-07-22",
              "frame": "CY2014Q2"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 167047000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2014"
            }
          ]
        }
      },
      "BusinessAcquisitionsProFormaRevenue": {
        "label": "Business Acquisition, Pro Forma Revenue",
        "description": "The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.",
        "units": {
          "USD": [
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 1978169000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2012"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 1978169000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14"
            },
            {
              "start": "2012-10-01",
              "end": "2012-12-31",
              "val": 438739000,
              "accn": "0000108312-14-000005",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-01-22",
              "frame": "CY2012Q4"
            },
            {
              "start": "2012-10-01",
              "end": "2013-03-31",
              "val": 924252000,
              "accn": "0000108312-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-04-23"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 485513000,
              "accn": "0000108312-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-04-23",
              "frame": "CY2013Q1"
            },
            {
              "start": "2012-10-01",
              "end": "2013-06-30",
              "val": 1408011000,
              "accn": "0000108312-14-000032",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-07-22"
            },
            {
              "start": "2013-04-01",
              "end": "2013-06-30",
              "val": 483759000,
              "accn": "0000108312-14-000032",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-07-22",
              "frame": "CY2013Q2"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 1966376000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2013"
            },
            {
              "start": "2012-10-01",
              "end": "2013-09-30",
              "val": 1966376000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14"
            },
            {
              "start": "2013-10-01",
              "end": "2013-12-31",
              "val": 429042000,
              "accn": "0000108312-14-000005",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-01-22",
              "frame": "CY2013Q4"
            },
            {
              "start": "2013-10-01",
              "end": "2014-03-31",
              "val": 911509000,
              "accn": "0000108312-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-04-23"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": 482467000,
              "accn": "0000108312-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-04-23",
              "frame": "CY2014Q1"
            },
            {
              "start": "2013-10-01",
              "end": "2014-06-30",
              "val": 1435793000,
              "accn": "0000108312-14-000032",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-07-22"
            },
            {
              "start": "2014-04-01",
              "end": "2014-06-30",
              "val": 524284000,
              "accn": "0000108312-14-000032",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-07-22",
              "frame": "CY2014Q2"
            },
            {
              "start": "2013-10-01",
              "end": "2014-09-30",
              "val": 2001240000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2014"
            }
          ]
        }
      },
      "BusinessCombinationAcquisitionRelatedCosts": {
        "label": "Business Combination, Acquisition Related Costs",
        "description": "This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.",
        "units": {
          "USD": [
            {
              "start": "2010-10-01",
              "end": "2011-06-30",
              "val": 1964000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2011-04-01",
              "end": "2011-06-30",
              "val": 219000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26",
              "frame": "CY2011Q2"
            },
            {
              "start": "2018-10-01",
              "end": "2018-12-31",
              "val": 3799000,
              "accn": "0000108312-19-000007",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-02-08",
              "frame": "CY2018Q4"
            },
            {
              "start": "2018-10-01",
              "end": "2019-03-31",
              "val": 7497000,
              "accn": "0000108312-19-000012",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-05-08"
            },
            {
              "start": "2019-01-01",
              "end": "2019-03-31",
              "val": 3698000,
              "accn": "0000108312-19-000012",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1"
            }
          ]
        }
      },
      "CapitalExpendituresIncurredButNotYetPaid": {
        "label": "Capital Expenditures Incurred but Not yet Paid",
        "description": "Future cash outflow to pay for purchases of fixed assets that have occurred.",
        "units": {
          "USD": [
            {
              "start": "2008-10-01",
              "end": "2009-09-30",
              "val": 3880000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2009"
            },
            {
              "start": "2009-10-01",
              "end": "2010-06-30",
              "val": 751000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": 2270000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": 2270000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
              "end": "2010-12-31",
              "val": 926000,
              "accn": "0000950123-12-001106",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-01-24",
              "frame": "CY2010Q4"
            },
            {
              "start": "2010-10-01",
              "end": "2011-03-31",
              "val": 1942000,
              "accn": "0001193125-12-176490",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-04-24"
            },
            {
              "start": "2010-10-01",
              "end": "2011-06-30",
              "val": 1881000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2010-10-01",
              "end": "2011-06-30",
              "val": 1881000,
              "accn": "0001193125-12-310822",
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              "accn": "0001193125-25-296204",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-25",
              "frame": "CY2025"
            }
          ]
        }
      },
      "CapitalizedContractCostGross": {
        "label": "Capitalized Contract Cost, Gross",
        "description": "Amount, before accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.",
        "units": {
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            {
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              "val": 105206000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2020-09-30",
              "val": 133349000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
              "end": "2020-09-30",
              "val": 133349000,
              "accn": "0001564590-21-057773",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-19",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2021-09-30",
              "val": 152885000,
              "accn": "0001564590-21-057773",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-19"
            },
            {
              "end": "2021-09-30",
              "val": 152885000,
              "accn": "0001564590-22-038033",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-18",
              "frame": "CY2021Q3I"
            },
            {
              "end": "2022-09-30",
              "val": 167610000,
              "accn": "0001564590-22-038033",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-18"
            },
            {
              "end": "2022-09-30",
              "val": 167610000,
              "accn": "0000950170-23-064764",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-17",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2023-09-30",
              "val": 180228000,
              "accn": "0000950170-23-064764",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-11-17"
            },
            {
              "end": "2023-09-30",
              "val": 180228000,
              "accn": "0000950170-24-130891",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-26",
              "frame": "CY2023Q3I"
            },
            {
              "end": "2024-09-30",
              "val": 185102000,
              "accn": "0000950170-24-130891",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-26"
            },
            {
              "end": "2024-09-30",
              "val": 185102000,
              "accn": "0001193125-25-296204",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-25",
              "frame": "CY2024Q3I"
            },
            {
              "end": "2025-09-30",
              "val": 203171000,
              "accn": "0001193125-25-296204",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-25",
              "frame": "CY2025Q3I"
            }
          ]
        }
      },
      "CapitalizedContractCostNet": {
        "label": "Capitalized Contract Cost, Net",
        "description": "Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.",
        "units": {
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              "val": 92091000,
              "accn": "0000108312-19-000007",
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              "form": "10-Q",
              "filed": "2019-02-08",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 99984000,
              "accn": "0000108312-19-000012",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 97789000,
              "accn": "0000108312-19-000014",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-08-12",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 105206000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25",
              "frame": "CY2019Q3I"
            }
          ]
        }
      },
      "CapitalLeaseObligationsIncurred": {
        "label": "Lease Obligation Incurred",
        "description": "Amount of increase in lease obligation from new lease.",
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              "val": 0,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2014"
            },
            {
              "start": "2014-10-01",
              "end": "2015-03-31",
              "val": 0,
              "accn": "0000108312-16-000027",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-04-20"
            },
            {
              "start": "2014-10-01",
              "end": "2015-06-30",
              "val": 0,
              "accn": "0000108312-16-000031",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-07-21"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 0,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2015"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 0,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16"
            },
            {
              "start": "2015-10-01",
              "end": "2016-03-31",
              "val": 1239000,
              "accn": "0000108312-17-000013",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-04-20"
            },
            {
              "start": "2015-10-01",
              "end": "2016-03-31",
              "val": 1239000,
              "accn": "0000108312-16-000027",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-04-20"
            },
            {
              "start": "2015-10-01",
              "end": "2016-06-30",
              "val": 1626000,
              "accn": "0000108312-17-000018",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-07-25"
            },
            {
              "start": "2015-10-01",
              "end": "2016-06-30",
              "val": 1626000,
              "accn": "0000108312-16-000031",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-07-21"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 1653000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2016"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 1653000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13"
            },
            {
              "start": "2015-10-01",
              "end": "2016-09-30",
              "val": 1653000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16"
            },
            {
              "start": "2016-10-01",
              "end": "2017-03-31",
              "val": 0,
              "accn": "0000108312-17-000013",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-04-20"
            },
            {
              "start": "2016-10-01",
              "end": "2017-06-30",
              "val": 0,
              "accn": "0000108312-17-000018",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-07-25"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 0,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2017"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 0,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13"
            },
            {
              "start": "2017-10-01",
              "end": "2018-09-30",
              "val": 0,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2018"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDue": {
        "label": "Capital Leases, Future Minimum Payments Due",
        "description": "Amount of minimum lease payments for capital leases.",
        "units": {
          "USD": [
            {
              "end": "2016-09-30",
              "val": 1384000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 1017000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 896000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 347000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 347000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "end": "2019-09-30",
              "val": 347000,
              "accn": "0000108312-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-02-10"
            },
            {
              "end": "2019-09-30",
              "val": 347000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25"
            },
            {
              "end": "2020-09-30",
              "val": 347000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueCurrent": {
        "label": "Capital Leases, Future Minimum Payments Due, Next Twelve Months",
        "description": "Amount of minimum lease payments for capital leases 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": "2016-09-30",
              "val": 404000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 444000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 566000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 213000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 213000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "end": "2019-09-30",
              "val": 213000,
              "accn": "0000108312-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-02-10"
            },
            {
              "end": "2019-09-30",
              "val": 213000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25"
            },
            {
              "end": "2020-09-30",
              "val": 213000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueInFiveYears": {
        "label": "Capital Leases, Future Minimum Payments Due in Five Years",
        "description": "Amount of minimum lease payments for capital leases 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": "2016-09-30",
              "val": 0,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 0,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueInFourYears": {
        "label": "Capital Leases, Future Minimum Payments Due in Four Years",
        "description": "Amount of minimum lease payments for capital leases 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": "2016-09-30",
              "val": 113000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 0,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 3000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 3000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "end": "2019-09-30",
              "val": 3000,
              "accn": "0000108312-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-02-10"
            },
            {
              "end": "2019-09-30",
              "val": 3000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25"
            },
            {
              "end": "2020-09-30",
              "val": 3000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueInThreeYears": {
        "label": "Capital Leases, Future Minimum Payments Due in Three Years",
        "description": "Amount of minimum lease payments for capital leases 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": "2016-09-30",
              "val": 444000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 122000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 118000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 33000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 33000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "end": "2019-09-30",
              "val": 33000,
              "accn": "0000108312-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-02-10"
            },
            {
              "end": "2019-09-30",
              "val": 33000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25"
            },
            {
              "end": "2020-09-30",
              "val": 33000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueInTwoYears": {
        "label": "Capital Leases, Future Minimum Payments Due in Two Years",
        "description": "Amount of minimum lease payments for capital leases 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": "2016-09-30",
              "val": 423000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 451000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 212000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 98000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 98000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "end": "2019-09-30",
              "val": 98000,
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              "form": "10-K",
              "filed": "2024-11-26"
            },
            {
              "start": "2022-10-01",
              "end": "2023-09-30",
              "val": -1020000,
              "accn": "0001193125-25-296204",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-25",
              "frame": "CY2023"
            },
            {
              "start": "2023-10-01",
              "end": "2024-09-30",
              "val": 8369000,
              "accn": "0000950170-24-130891",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-11-26"
            },
            {
              "start": "2023-10-01",
              "end": "2024-09-30",
              "val": -8369000,
              "accn": "0001193125-25-296204",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-25",
              "frame": "CY2024"
            },
            {
              "start": "2024-10-01",
              "end": "2025-09-30",
              "val": -512000,
              "accn": "0001193125-25-296204",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-11-25",
              "frame": "CY2025"
            }
          ]
        }
      },
      "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": "2011-09-30",
              "val": 22485000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 23272000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15"
            },
            {
              "end": "2012-09-30",
              "val": 23272000,
              "accn": "0000108312-13-000004",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-01-23"
            },
            {
              "end": "2012-09-30",
              "val": 23272000,
              "accn": "0000108312-13-000010",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-04-23"
            },
            {
              "end": "2012-09-30",
              "val": 23272000,
              "accn": "0000108312-13-000013",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-07-26"
            },
            {
              "end": "2012-09-30",
              "val": 23272000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 23251000,
              "accn": "0000108312-13-000004",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-01-23",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-03-31",
              "val": 22936000,
              "accn": "0000108312-13-000010",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-04-23",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 22843000,
              "accn": "0000108312-13-000013",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-07-26",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 24400000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14"
            },
            {
              "end": "2013-09-30",
              "val": 24400000,
              "accn": "0000108312-14-000005",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-01-22"
            },
            {
              "end": "2013-09-30",
              "val": 24400000,
              "accn": "0000108312-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-04-23"
            },
            {
              "end": "2013-09-30",
              "val": 24400000,
              "accn": "0000108312-14-000032",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-07-22"
            },
            {
              "end": "2013-09-30",
              "val": 24400000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-31",
              "val": 24510000,
              "accn": "0000108312-14-000005",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-01-22",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-03-31",
              "val": 24399000,
              "accn": "0000108312-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-04-23",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-30",
              "val": 24433000,
              "accn": "0000108312-14-000032",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-07-22",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
              "val": 20992000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12"
            },
            {
              "end": "2014-09-30",
              "val": 20992000,
              "accn": "0000108312-15-000005",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-01-21"
            },
            {
              "end": "2014-09-30",
              "val": 20992000,
              "accn": "0000108312-15-000012",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-04-21"
            },
            {
              "end": "2014-09-30",
              "val": 20992000,
              "accn": "0001562762-15-000203",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-07-21"
            },
            {
              "end": "2014-09-30",
              "val": 20992000,
              "accn": "0000108312-15-000018",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-12",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2014-12-31",
              "val": 21105000,
              "accn": "0000108312-15-000005",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-01-21",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-03-31",
              "val": 23975000,
              "accn": "0000108312-15-000012",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-04-21",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2015-06-30",
              "val": 23906000,
              "accn": "0001562762-15-000203",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-07-21",
              "frame": "CY2015Q2I"
            },
            {
              "end": "2015-09-30",
              "val": 20939000,
              "accn": "0000108312-15-000018",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-12"
            },
            {
              "end": "2015-09-30",
              "val": 20939000,
              "accn": "0000108312-16-000024",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-02-09"
            },
            {
              "end": "2015-09-30",
              "val": 20939000,
              "accn": "0000108312-16-000027",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-04-20"
            },
            {
              "end": "2015-09-30",
              "val": 20939000,
              "accn": "0000108312-16-000031",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-07-21"
            },
            {
              "end": "2015-09-30",
              "val": 20939000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2015-12-31",
              "val": 21000000,
              "accn": "0000108312-16-000024",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-02-09",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-03-31",
              "val": 22268000,
              "accn": "0000108312-16-000027",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-04-20",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2016-06-30",
              "val": 25517000,
              "accn": "0000108312-16-000031",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-07-21",
              "frame": "CY2016Q2I"
            },
            {
              "end": "2016-09-30",
              "val": 29344000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16"
            },
            {
              "end": "2016-09-30",
              "val": 29344000,
              "accn": "0000108312-17-000006",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-01-25"
            },
            {
              "end": "2016-09-30",
              "val": 29344000,
              "accn": "0000108312-17-000013",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-04-20"
            },
            {
              "end": "2016-09-30",
              "val": 29344000,
              "accn": "0000108312-17-000018",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-07-25"
            },
            {
              "end": "2016-09-30",
              "val": 29344000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2016-12-31",
              "val": 29133000,
              "accn": "0000108312-17-000006",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-01-25",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-03-31",
              "val": 26841000,
              "accn": "0000108312-17-000013",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-04-20",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2017-06-30",
              "val": 26950000,
              "accn": "0000108312-17-000018",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-07-25",
              "frame": "CY2017Q2I"
            },
            {
              "end": "2017-09-30",
              "val": 24308000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            }
          ]
        }
      },
      "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": "2011-06-30",
              "val": 153918000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 130213000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 129344000,
              "accn": "0000950123-12-001106",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-01-24",
              "frame": "CY2011Q4"
            },
            {
              "start": "2011-10-01",
              "end": "2012-03-31",
              "val": 129802000,
              "accn": "0001193125-12-176490",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-04-24"
            }
          ]
        }
      },
      "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": "2011-06-30",
              "val": 8973000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 24508000,
              "accn": "0000950123-12-001106",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-01-24",
              "frame": "CY2011Q4"
            },
            {
              "start": "2011-10-01",
              "end": "2012-03-31",
              "val": 16309000,
              "accn": "0001193125-12-176490",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-04-24"
            }
          ]
        }
      },
      "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": "2011-06-30",
              "val": 25029000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 23060000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 23493000,
              "accn": "0000950123-12-001106",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-01-24",
              "frame": "CY2011Q4"
            },
            {
              "start": "2011-10-01",
              "end": "2012-03-31",
              "val": 23496000,
              "accn": "0001193125-12-176490",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-04-24"
            }
          ]
        }
      },
      "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": "2011-06-30",
              "val": 27545000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 24861000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 24861000,
              "accn": "0000950123-12-001106",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-01-24",
              "frame": "CY2011Q4"
            },
            {
              "start": "2011-10-01",
              "end": "2012-03-31",
              "val": 24864000,
              "accn": "0001193125-12-176490",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-04-24"
            }
          ]
        }
      },
      "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": "2011-09-30",
              "val": 32872000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011"
            }
          ]
        }
      },
      "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": "2011-06-30",
              "val": 30701000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 27370000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 27370000,
              "accn": "0000950123-12-001106",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-01-24",
              "frame": "CY2011Q4"
            },
            {
              "start": "2011-10-01",
              "end": "2012-03-31",
              "val": 27374000,
              "accn": "0001193125-12-176490",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-04-24"
            }
          ]
        }
      },
      "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": "2011-06-30",
              "val": 33062000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 30521000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 30521000,
              "accn": "0000950123-12-001106",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-01-24",
              "frame": "CY2011Q4"
            },
            {
              "start": "2011-10-01",
              "end": "2012-03-31",
              "val": 30525000,
              "accn": "0001193125-12-176490",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-04-24"
            }
          ]
        }
      },
      "GainLossOnComponentsExcludedFromAssessmentOfInterestRateCashFlowHedgeEffectiveness": {
        "label": "Gain (Loss) on Components Excluded from Assessment of Interest Rate Cash Flow Hedge Effectiveness",
        "description": "The net gain (loss) included in earnings for the period relating to components of the gain (loss) on interest rate cash flow hedging instruments excluded from the assessment of fair value hedge effectiveness.",
        "units": {
          "USD": [
            {
              "start": "2019-10-01",
              "end": "2020-06-30",
              "val": 30481000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10"
            },
            {
              "start": "2019-10-01",
              "end": "2020-06-30",
              "val": 30481000,
              "accn": "0001564590-21-040355",
              "fy": 2021,
              "fp": "Q3",
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              "filed": "2021-08-04"
            },
            {
              "start": "2020-04-01",
              "end": "2020-06-30",
              "val": 30481000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10"
            },
            {
              "start": "2020-04-01",
              "end": "2020-06-30",
              "val": 30481000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
              "start": "2020-04-01",
              "end": "2020-06-30",
              "val": 30481000,
              "accn": "0001564590-21-040355",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-08-04",
              "frame": "CY2020Q2"
            },
            {
              "start": "2019-10-01",
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              "val": 30481000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": 30481000,
              "accn": "0001564590-21-057773",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-11-19"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": 30481000,
              "accn": "0001564590-22-038033",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-11-18",
              "frame": "CY2020"
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          ]
        }
      },
      "GainLossOnDispositionOfAssets": {
        "label": "Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property",
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              "val": 99000,
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              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2010-04-01",
              "end": "2010-06-30",
              "val": 156000,
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            {
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              "filed": "2011-11-16"
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            {
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              "fy": 2012,
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              "val": 72000,
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              "fy": 2013,
              "fp": "Q2",
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              "filed": "2013-04-23"
            },
            {
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              "end": "2012-03-31",
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            {
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              "end": "2012-06-30",
              "val": 12000,
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            {
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              "fy": 2013,
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              "form": "10-Q",
              "filed": "2013-01-23",
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            {
              "start": "2012-10-01",
              "end": "2013-03-31",
              "val": 230000,
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              "fy": 2013,
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            {
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              "val": 229000,
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              "fy": 2013,
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              "form": "10-Q",
              "filed": "2013-04-23",
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              "filed": "2013-07-26"
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            {
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              "accn": "0000108312-15-000005",
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              "filed": "2014-07-22"
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            {
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              "val": -166000,
              "accn": "0000108312-15-000018",
              "fy": 2015,
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            {
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              "val": 60000,
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              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-01-21"
            },
            {
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              "val": 60000,
              "accn": "0000108312-16-000024",
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              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-02-09",
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            {
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              "end": "2015-03-31",
              "val": 718000,
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              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-04-21"
            },
            {
              "start": "2014-10-01",
              "end": "2015-03-31",
              "val": 718000,
              "accn": "0000108312-16-000027",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-04-20"
            },
            {
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              "end": "2015-03-31",
              "val": 658000,
              "accn": "0000108312-15-000012",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-04-21"
            },
            {
              "start": "2015-01-01",
              "end": "2015-03-31",
              "val": 658000,
              "accn": "0000108312-16-000027",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-04-20",
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            {
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              "val": 766000,
              "accn": "0001562762-15-000203",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-07-21"
            },
            {
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              "end": "2015-06-30",
              "val": 766000,
              "accn": "0000108312-16-000031",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-07-21"
            },
            {
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              "end": "2015-06-30",
              "val": 48000,
              "accn": "0001562762-15-000203",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-07-21"
            },
            {
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              "end": "2015-06-30",
              "val": 48000,
              "accn": "0000108312-16-000031",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-07-21",
              "frame": "CY2015Q2"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 626000,
              "accn": "0000108312-15-000018",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-12"
            },
            {
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              "end": "2015-09-30",
              "val": 626000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16"
            },
            {
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              "end": "2015-09-30",
              "val": 626000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2015"
            },
            {
              "start": "2015-10-01",
              "end": "2015-12-31",
              "val": 1602000,
              "accn": "0000108312-16-000024",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-02-09"
            },
            {
              "start": "2015-10-01",
              "end": "2015-12-31",
              "val": 1602000,
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              "filed": "2015-11-12",
              "frame": "CY2014Q3I"
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            {
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        "description": "The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.",
        "units": {
          "pure": [
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              "end": "2010-06-30",
              "val": 0.26,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-06-30",
              "val": 0.26,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16"
            }
          ]
        }
      },
      "MinorityInterestOwnershipPercentageByParent": {
        "label": "Noncontrolling Interest, Ownership Percentage by Parent",
        "description": "The parent entity's interest in net assets of the subsidiary, expressed as a percentage.",
        "units": {
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              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2011Q3I"
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            {
              "end": "2011-09-30",
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              "fy": 2011,
              "fp": "FY",
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              "filed": "2011-11-16"
            }
          ]
        }
      },
      "MultiemployerPlanContributionsByEmployer": {
        "label": "Multiemployer Plan, Contributions by Employer (Deprecated 2020-01-31)",
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        "units": {
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              "val": 475000,
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              "fp": "FY",
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              "filed": "2018-11-13",
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              "start": "2015-10-01",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13"
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              "end": "2016-12-31",
              "val": 68000,
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              "fp": "Q1",
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              "filed": "2018-01-24",
              "frame": "CY2016Q4"
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              "start": "2016-10-01",
              "end": "2017-03-31",
              "val": 147000,
              "accn": "0000108312-18-000011",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-04-25"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": 79000,
              "accn": "0000108312-18-000011",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-04-25",
              "frame": "CY2017Q1"
            },
            {
              "start": "2016-10-01",
              "end": "2017-06-30",
              "val": 220000,
              "accn": "0000108312-18-000016",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-08-08"
            },
            {
              "start": "2017-04-01",
              "end": "2017-06-30",
              "val": 73000,
              "accn": "0000108312-18-000016",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-08-08",
              "frame": "CY2017Q2"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 292000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25",
              "frame": "CY2017"
            },
            {
              "start": "2016-10-01",
              "end": "2017-09-30",
              "val": 292000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13"
            },
            {
              "start": "2016-10-01",
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              "val": 292000,
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              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13"
            },
            {
              "start": "2017-10-01",
              "end": "2017-12-31",
              "val": 79000,
              "accn": "0000108312-19-000007",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-02-08",
              "frame": "CY2017Q4"
            },
            {
              "start": "2017-10-01",
              "end": "2017-12-31",
              "val": 79000,
              "accn": "0000108312-18-000007",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-01-24"
            },
            {
              "start": "2017-10-01",
              "end": "2018-03-31",
              "val": 167000,
              "accn": "0000108312-19-000012",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-05-08"
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            {
              "start": "2017-10-01",
              "end": "2018-03-31",
              "val": 167000,
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              "fy": 2018,
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              "form": "10-Q",
              "filed": "2018-04-25"
            },
            {
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              "end": "2018-03-31",
              "val": 87000,
              "accn": "0000108312-19-000012",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2018Q1"
            },
            {
              "start": "2018-01-01",
              "end": "2018-03-31",
              "val": 87000,
              "accn": "0000108312-18-000011",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-04-25"
            },
            {
              "start": "2017-10-01",
              "end": "2018-06-30",
              "val": 253000,
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              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-08-12"
            },
            {
              "start": "2017-10-01",
              "end": "2018-06-30",
              "val": 253000,
              "accn": "0000108312-18-000016",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-08-08"
            },
            {
              "start": "2018-04-01",
              "end": "2018-06-30",
              "val": 86000,
              "accn": "0000108312-19-000014",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-08-12",
              "frame": "CY2018Q2"
            },
            {
              "start": "2018-04-01",
              "end": "2018-06-30",
              "val": 86000,
              "accn": "0000108312-18-000016",
              "fy": 2018,
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              "form": "10-Q",
              "filed": "2018-08-08"
            },
            {
              "start": "2017-10-01",
              "end": "2018-09-30",
              "val": 334000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25",
              "frame": "CY2018"
            },
            {
              "start": "2017-10-01",
              "end": "2018-09-30",
              "val": 334000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13"
            },
            {
              "start": "2018-10-01",
              "end": "2018-12-31",
              "val": 77000,
              "accn": "0000108312-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-02-10",
              "frame": "CY2018Q4"
            },
            {
              "start": "2018-10-01",
              "end": "2018-12-31",
              "val": 77000,
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              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-02-08"
            },
            {
              "start": "2018-10-01",
              "end": "2019-03-31",
              "val": 138000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "start": "2018-10-01",
              "end": "2019-03-31",
              "val": 138000,
              "accn": "0000108312-19-000012",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-05-08"
            },
            {
              "start": "2019-01-01",
              "end": "2019-03-31",
              "val": 61000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11",
              "frame": "CY2019Q1"
            },
            {
              "start": "2019-01-01",
              "end": "2019-03-31",
              "val": 61000,
              "accn": "0000108312-19-000012",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-05-08"
            },
            {
              "start": "2018-10-01",
              "end": "2019-06-30",
              "val": 193000,
              "accn": "0000108312-19-000014",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-08-12"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 55000,
              "accn": "0000108312-19-000014",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-08-12",
              "frame": "CY2019Q2"
            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 252000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25",
              "frame": "CY2019"
            },
            {
              "start": "2019-10-01",
              "end": "2019-12-31",
              "val": 70000,
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              "fy": 2020,
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              "form": "10-Q",
              "filed": "2020-02-10",
              "frame": "CY2019Q4"
            },
            {
              "start": "2019-10-01",
              "end": "2020-03-31",
              "val": 198000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "start": "2020-01-01",
              "end": "2020-03-31",
              "val": 128000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11",
              "frame": "CY2020Q1"
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          ]
        }
      },
      "MultiemployerPlanEmployerContributionCost": {
        "label": "Multiemployer Plan, Employer Contribution, Cost",
        "description": "Amount of cost for employer contribution to multiemployer plan. Multiemployer plan includes, but is not limited to, pension plan determined to be individually significant and insignificant and other postretirement benefit plan.",
        "units": {
          "USD": [
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              "end": "2018-09-30",
              "val": 334000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2018"
            },
            {
              "start": "2018-10-01",
              "end": "2019-06-30",
              "val": 193000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 55000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
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            },
            {
              "start": "2018-10-01",
              "end": "2019-09-30",
              "val": 252000,
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              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2019"
            },
            {
              "start": "2019-10-01",
              "end": "2019-12-31",
              "val": 70000,
              "accn": "0001564590-21-004296",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-02-04",
              "frame": "CY2019Q4"
            },
            {
              "start": "2019-10-01",
              "end": "2020-06-30",
              "val": 325000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10"
            },
            {
              "start": "2020-04-01",
              "end": "2020-06-30",
              "val": 127000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2020Q2"
            },
            {
              "start": "2019-10-01",
              "end": "2020-09-30",
              "val": 417000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020"
            },
            {
              "start": "2020-10-01",
              "end": "2020-12-31",
              "val": 68000,
              "accn": "0001564590-21-004296",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-02-04",
              "frame": "CY2020Q4"
            }
          ]
        }
      },
      "MultiemployerPlanPeriodContributions": {
        "label": "Multiemployer Plan, Period Contributions (Deprecated 2017-01-31)",
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        "units": {
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              "filed": "2011-11-16",
              "frame": "CY2009"
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            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": 495000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 476000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011"
            },
            {
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              "end": "2016-03-31",
              "val": 287000,
              "accn": "0000108312-17-000013",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-04-20"
            },
            {
              "start": "2016-01-01",
              "end": "2016-03-31",
              "val": 157000,
              "accn": "0000108312-17-000013",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-04-20",
              "frame": "CY2016Q1"
            },
            {
              "start": "2015-10-01",
              "end": "2016-06-30",
              "val": 397000,
              "accn": "0000108312-17-000018",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-07-25"
            },
            {
              "start": "2016-04-01",
              "end": "2016-06-30",
              "val": 110000,
              "accn": "0000108312-17-000018",
              "fy": 2017,
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              "form": "10-Q",
              "filed": "2017-07-25",
              "frame": "CY2016Q2"
            },
            {
              "start": "2016-10-01",
              "end": "2017-03-31",
              "val": 147000,
              "accn": "0000108312-17-000013",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-04-20"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": 79000,
              "accn": "0000108312-17-000013",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-04-20",
              "frame": "CY2017Q1"
            },
            {
              "start": "2016-10-01",
              "end": "2017-06-30",
              "val": 220000,
              "accn": "0000108312-17-000018",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-07-25"
            },
            {
              "start": "2017-04-01",
              "end": "2017-06-30",
              "val": 73000,
              "accn": "0000108312-17-000018",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-07-25",
              "frame": "CY2017Q2"
            }
          ]
        }
      },
      "NetCashProvidedByUsedInFinancingActivities": {
        "label": "Net Cash Provided by (Used in) Financing Activities",
        "description": "Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.",
        "units": {
          "USD": [
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              "start": "2007-10-01",
              "end": "2008-09-30",
              "val": -49573000,
              "accn": "0000950123-10-106894",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-11-18",
              "frame": "CY2008"
            },
            {
              "start": "2008-10-01",
              "end": "2009-06-30",
              "val": 607757000,
              "accn": "0000950123-10-069256",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-07-29"
            },
            {
              "start": "2008-10-01",
              "end": "2009-09-30",
              "val": 487365000,
              "accn": "0000950123-10-106894",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-11-18"
            },
            {
              "start": "2008-10-01",
              "end": "2009-09-30",
              "val": 487365000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2009"
            },
            {
              "start": "2009-10-01",
              "end": "2009-12-31",
              "val": -50594000,
              "accn": "0000950123-11-004929",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-01-25",
              "frame": "CY2009Q4"
            },
            {
              "start": "2009-10-01",
              "end": "2010-03-31",
              "val": -114580000,
              "accn": "0000950123-11-040137",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-04-27"
            },
            {
              "start": "2009-10-01",
              "end": "2010-06-30",
              "val": -137669000,
              "accn": "0000950123-10-069256",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-07-29"
            },
            {
              "start": "2009-10-01",
              "end": "2010-06-30",
              "val": -137669000,
              "accn": "0000950123-11-067967",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-07-26"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": -128985000,
              "accn": "0000950123-10-106894",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-11-18"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": -128985000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
              "end": "2010-12-31",
              "val": -39819000,
              "accn": "0000950123-11-004929",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-01-25"
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              "end": "2020-09-30",
              "val": 6667000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "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": 2814000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 2805000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 2057000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 1377000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 2247000,
              "accn": "0000108312-15-000018",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-12",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 1899000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 2148000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 2542000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 2378000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 2378000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "end": "2019-09-30",
              "val": 2378000,
              "accn": "0000108312-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-02-10"
            },
            {
              "end": "2019-09-30",
              "val": 2378000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25"
            },
            {
              "end": "2020-09-30",
              "val": 2378000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "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": 3620000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 3219000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 4019000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 2548000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 2620000,
              "accn": "0000108312-15-000018",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-12",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 2003000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 3188000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 3227000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 2899000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 2899000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "end": "2019-09-30",
              "val": 2899000,
              "accn": "0000108312-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-02-10"
            },
            {
              "end": "2019-09-30",
              "val": 2899000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25"
            },
            {
              "end": "2020-09-30",
              "val": 2899000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "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": 4706000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 4278000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 4801000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 3264000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 3058000,
              "accn": "0000108312-15-000018",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-12",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 2175000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 3872000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 4228000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 3823000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 3823000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "end": "2019-09-30",
              "val": 3823000,
              "accn": "0000108312-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-02-10"
            },
            {
              "end": "2019-09-30",
              "val": 3823000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25"
            },
            {
              "end": "2020-09-30",
              "val": 3823000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "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": 5583000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 6014000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 6660000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 4327000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 4450000,
              "accn": "0000108312-15-000018",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-12",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 3150000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 4265000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 4808000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 5119000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 5119000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "end": "2019-09-30",
              "val": 5119000,
              "accn": "0000108312-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-02-10"
            },
            {
              "end": "2019-09-30",
              "val": 5119000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25"
            },
            {
              "end": "2020-09-30",
              "val": 5119000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "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": 7508000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-09-30",
              "val": 5730000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-09-30",
              "val": 4047000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-09-30",
              "val": 1430000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-11-12",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2015-09-30",
              "val": 1378000,
              "accn": "0000108312-15-000018",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-11-12",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2016-09-30",
              "val": 1630000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2017-09-30",
              "val": 3427000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2018-09-30",
              "val": 3636000,
              "accn": "0000108312-18-000023",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-11-13",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 6033000,
              "accn": "0001564590-20-038956",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-08-10",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-09-30",
              "val": 6033000,
              "accn": "0000108312-20-000006",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-05-11"
            },
            {
              "end": "2019-09-30",
              "val": 6033000,
              "accn": "0000108312-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-02-10"
            },
            {
              "end": "2019-09-30",
              "val": 6033000,
              "accn": "0000108312-19-000017",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-11-25"
            },
            {
              "end": "2020-09-30",
              "val": 6033000,
              "accn": "0001564590-20-054809",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-11-20",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "OperatingLeasesRentExpenseNet": {
        "label": "Operating Leases, Rent Expense, Net",
        "description": "Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.",
        "units": {
          "USD": [
            {
              "start": "2008-10-01",
              "end": "2009-09-30",
              "val": 11155000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2009"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": 9604000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15",
              "frame": "CY2010"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": 9604000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 10159000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 10159000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 10159000,
              "accn": "0000108312-13-000018",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-11-14",
              "frame": "CY2011"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 10247000,
              "accn": "0001193125-12-472182",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-11-15"
            },
            {
              "start": "2011-10-01",
              "end": "2012-09-30",
              "val": 10247000,
              "accn": "0000108312-14-000037",
              "fy": 2014,
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              "filed": "2026-07-30"
            },
            {
              "start": "2026-04-01",
              "end": "2026-06-30",
              "val": 194000,
              "accn": "0001193125-26-325790",
              "fy": 2026,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2026-07-30",
              "frame": "CY2026Q2"
            }
          ]
        }
      },
      "OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax": {
        "label": "Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax (Deprecated 2012-01-31)",
        "description": "Pretax change 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, that has not been recognized in net periodic benefit cost.",
        "units": {
          "USD": [
            {
              "start": "2008-10-01",
              "end": "2009-09-30",
              "val": 25311000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2009"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": -7873000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 3088000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011"
            }
          ]
        }
      },
      "OtherComprehensiveIncomeDefinedBenefitPlansTax": {
        "label": "Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax (Deprecated 2012-01-31)",
        "description": "Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.",
        "units": {
          "USD": [
            {
              "start": "2008-10-01",
              "end": "2009-09-30",
              "val": 11343000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2009"
            },
            {
              "start": "2009-10-01",
              "end": "2010-09-30",
              "val": -2058000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
              "end": "2011-09-30",
              "val": 1120000,
              "accn": "0000950123-11-099073",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2011"
            }
          ]
        }
      },
      "OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPeriodIncreaseDecrease": {
        "label": "Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax (Deprecated 2012-01-31)",
        "description": "Pre tax change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges, net of reclassifications into earnings during the period. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. Includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.",
        "units": {
          "USD": [
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              "start": "2007-10-01",
              "end": "2008-09-30",
              "val": 108000,
              "accn": "0000950123-10-106894",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2010-11-18",
              "frame": "CY2008"
            },
            {
              "start": "2008-10-01",
              "end": "2009-09-30",
              "val": -1308000,
              "accn": "0000950123-10-106894",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
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          ]
        }
      },
      "OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease": {
        "label": "Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax (Deprecated 2012-01-31)",
        "description": "Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.",
        "units": {
          "USD": [
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              "end": "2009-06-30",
              "val": -811000,
              "accn": "0000950123-10-069256",
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              "form": "10-Q",
              "filed": "2010-07-29"
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            {
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              "end": "2009-09-30",
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              "frame": "CY2009"
            },
            {
              "start": "2009-10-01",
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              "val": 174000,
              "accn": "0000950123-11-099073",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-11-16",
              "frame": "CY2010"
            },
            {
              "start": "2010-10-01",
              "end": "2010-12-31",
              "val": 37000,
              "accn": "0000950123-12-001106",
              "fy": 2012,
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              "form": "10-Q",
              "filed": "2012-01-24",
              "frame": "CY2010Q4"
            },
            {
              "start": "2010-10-01",
              "end": "2011-03-31",
              "val": 72000,
              "accn": "0001193125-12-176490",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-04-24"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 35000,
              "accn": "0001193125-12-176490",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
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              "frame": "CY2011Q1"
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            {
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              "val": 143000,
              "accn": "0000950123-11-099073",
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            {
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              "accn": "0000950123-12-001106",
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              "form": "10-Q",
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          ]
        }
      },
      "OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent": {
        "label": "Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent",
        "description": "Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss), attributable to parent entity.",
        "units": {
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              "fp": "FY",
              "form": "10-K",
              "filed": "2016-11-16",
              "frame": "CY2014"
            },
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              "end": "2014-12-31",
              "val": 15000,
              "accn": "0000108312-16-000024",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-02-09",
              "frame": "CY2014Q4"
            },
            {
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              "end": "2015-03-31",
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              "accn": "0000108312-16-000027",
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              "val": 16000,
              "accn": "0000108312-16-000027",
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              "form": "10-Q",
              "filed": "2016-04-20",
              "frame": "CY2015Q1"
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              "end": "2015-06-30",
              "val": 46000,
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              "filed": "2016-07-21"
            },
            {
              "start": "2015-04-01",
              "end": "2015-06-30",
              "val": 15000,
              "accn": "0000108312-16-000031",
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            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 61000,
              "accn": "0000108312-17-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-11-13",
              "frame": "CY2015"
            },
            {
              "start": "2014-10-01",
              "end": "2015-09-30",
              "val": 61000,
              "accn": "0000108312-16-000038",
              "fy": 2016,
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            {
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              "end": "2015-12-31",
              "val": 18000,
              "accn": "0000108312-17-000006",
              "fy": 2017,
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            {
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              "fy": 2016,
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            {
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            {
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              "val": 18000,
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            {
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            {
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              "accn": "0000108312-17-000006",
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            {
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              "fy": 2018,
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              "form": "10-Q",
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            },
            {
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            },
            {
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            {
              "start": "2017-01-01",
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            {
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            {
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            {
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            {
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            {
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            {
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              "form": "10-K",
              "filed": "2025-11-25",
              "frame": "CY2024"
            },
            {
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              "filed": "2025-02-04"
            },
            {
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              "val": 1438000,
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            },
            {
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            },
            {
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            },
            {
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            {
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            {
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      },
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        "label": "Proceeds from Divestiture of Businesses, Net of Cash Divested",
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            {
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            {
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            {
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