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              "filed": "2012-12-10"
            },
            {
              "end": "2012-04-30",
              "val": 53558000,
              "accn": "0001193125-12-386640",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-09-10"
            },
            {
              "end": "2012-04-30",
              "val": 53558000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "end": "2012-07-31",
              "val": 45402000,
              "accn": "0001193125-12-386640",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-09-10",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-10-31",
              "val": 45082000,
              "accn": "0001193125-12-497094",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-12-10",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-04-30",
              "val": 43915000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesGrossRealizedGainLossNet": {
        "label": "Available-for-sale Securities, Gross Realized Gain (Loss)",
        "description": "This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.",
        "units": {
          "USD": [
            {
              "start": "2008-05-01",
              "end": "2009-04-30",
              "val": -5040000,
              "accn": "0000950123-11-062884",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-06-29",
              "frame": "CY2008"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesGrossUnrealizedLosses1": {
        "label": "Available-for-sale Securities, Gross Unrealized Losses (Deprecated 2013-01-31)",
        "description": "This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2010-04-30",
              "val": 45000,
              "accn": "0001193125-11-244603",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-09-09",
              "frame": "CY2010Q1I"
            },
            {
              "end": "2011-04-30",
              "val": 45000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2011Q1I"
            },
            {
              "end": "2011-04-30",
              "val": 45000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12"
            },
            {
              "end": "2011-04-30",
              "val": 45000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12"
            },
            {
              "end": "2011-07-31",
              "val": 33000,
              "accn": "0001193125-11-244603",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-09-09",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-10-31",
              "val": 166000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-01-31",
              "val": 98000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-04-30",
              "val": 21000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 21000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12"
            },
            {
              "end": "2012-04-30",
              "val": 21000,
              "accn": "0001193125-12-497094",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-12-10"
            },
            {
              "end": "2012-04-30",
              "val": 21000,
              "accn": "0001193125-12-386640",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-09-10"
            },
            {
              "end": "2012-04-30",
              "val": 21000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "end": "2012-07-31",
              "val": 1000,
              "accn": "0001193125-12-386640",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-09-10",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-10-31",
              "val": 19000,
              "accn": "0001193125-12-497094",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-12-10",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-04-30",
              "val": 14000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesNoncurrent": {
        "label": "Available-for-sale Securities, Noncurrent",
        "description": "Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.",
        "units": {
          "USD": [
            {
              "end": "2011-04-30",
              "val": 35081000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2011Q1I"
            },
            {
              "end": "2011-04-30",
              "val": 35081000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12"
            },
            {
              "end": "2011-04-30",
              "val": 35081000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12"
            },
            {
              "end": "2011-04-30",
              "val": 35081000,
              "accn": "0001193125-11-244603",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-09-09"
            },
            {
              "end": "2011-07-31",
              "val": 29555000,
              "accn": "0001193125-11-244603",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-09-09",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-10-31",
              "val": 27700000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-01-31",
              "val": 19195000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-04-30",
              "val": 20235000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 20235000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12"
            },
            {
              "end": "2012-04-30",
              "val": 20235000,
              "accn": "0001193125-12-497094",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-12-10"
            },
            {
              "end": "2012-04-30",
              "val": 20235000,
              "accn": "0001193125-12-386640",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-09-10"
            },
            {
              "end": "2012-04-30",
              "val": 20235000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "end": "2012-07-31",
              "val": 18579000,
              "accn": "0001193125-12-386640",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-09-10",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-10-31",
              "val": 19314000,
              "accn": "0001193125-12-497094",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-12-10",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-01-31",
              "val": 22241000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-04-30",
              "val": 28105000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-04-30",
              "val": 28105000,
              "accn": "0001193125-14-093853",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-03-11"
            },
            {
              "end": "2013-04-30",
              "val": 28105000,
              "accn": "0001193125-13-466957",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-12-09"
            },
            {
              "end": "2013-04-30",
              "val": 28105000,
              "accn": "0001193125-13-359698",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-09-06"
            },
            {
              "end": "2013-04-30",
              "val": 28105000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25"
            },
            {
              "end": "2013-07-31",
              "val": 12251000,
              "accn": "0001193125-13-359698",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-09-06",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-10-31",
              "val": 12272000,
              "accn": "0001193125-13-466957",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-12-09",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2014-01-31",
              "val": 12270000,
              "accn": "0001193125-14-093853",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-03-11",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-04-30",
              "val": 13296000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27",
              "frame": "CY2014Q1I"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesGrossUnrealizedGain": {
        "label": "Available-for-sale Securities, Gross Unrealized Gains (Deprecated 2013-01-31)",
        "description": "This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2010-04-30",
              "val": 117000,
              "accn": "0001193125-11-244603",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-09-09",
              "frame": "CY2010Q1I"
            },
            {
              "end": "2011-04-30",
              "val": 117000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2011Q1I"
            },
            {
              "end": "2011-04-30",
              "val": 117000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12"
            },
            {
              "end": "2011-04-30",
              "val": 117000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12"
            },
            {
              "end": "2011-07-31",
              "val": 124000,
              "accn": "0001193125-11-244603",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-09-09",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-10-31",
              "val": 74000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2012-01-31",
              "val": 85000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-04-30",
              "val": 82000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 82000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12"
            },
            {
              "end": "2012-04-30",
              "val": 82000,
              "accn": "0001193125-12-497094",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-12-10"
            },
            {
              "end": "2012-04-30",
              "val": 82000,
              "accn": "0001193125-12-386640",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-09-10"
            },
            {
              "end": "2012-04-30",
              "val": 82000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "end": "2012-07-31",
              "val": 108000,
              "accn": "0001193125-12-386640",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-09-10",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-10-31",
              "val": 109000,
              "accn": "0001193125-12-497094",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-12-10",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2013-04-30",
              "val": 94000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "BusinessAcquisitionCostOfAcquiredEntityCashPaid": {
        "label": "Business Acquisition, Cost of Acquired Entity, Cash Paid (Deprecated 2013-01-31)",
        "description": "Amount of cash paid to acquire the entity.",
        "units": {
          "USD": [
            {
              "end": "2010-04-30",
              "val": 25848000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2010Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 442000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2012Q1I"
            }
          ]
        }
      },
      "BusinessAcquisitionCostOfAcquiredEntityPurchasePrice": {
        "label": "Business Acquisition, Cost of Acquired Entity, Purchase Price (Deprecated 2013-01-31)",
        "description": "The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.",
        "units": {
          "USD": [
            {
              "end": "2012-04-30",
              "val": 442000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2013-01-31",
              "val": 126917000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-04-30",
              "val": 126917000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "BusinessAcquisitionCostOfAcquiredEntityTransactionCosts": {
        "label": "Business Acquisition, Transaction Costs",
        "description": "Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.",
        "units": {
          "USD": [
            {
              "end": "2013-04-30",
              "val": 2710000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-04-30",
              "val": 2710000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27"
            },
            {
              "end": "2013-04-30",
              "val": 2710000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25"
            },
            {
              "end": "2015-04-30",
              "val": 501000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2015Q1I"
            }
          ]
        }
      },
      "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": "2010-04-30",
              "val": 14055000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2010Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 137000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 137000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "end": "2013-01-31",
              "val": 33115000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-04-30",
              "val": 32784000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationAssetsAcquiredLiabilitiesAssumedNet": {
        "label": "Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net (Deprecated 2013-01-31)",
        "description": "The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition.",
        "units": {
          "USD": [
            {
              "end": "2010-04-30",
              "val": -2068000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2010Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 99000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 99000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "end": "2013-01-31",
              "val": 42675000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-04-30",
              "val": 44078000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "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": "2010-04-30",
              "val": 27916000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2010Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 343000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 343000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "end": "2013-01-31",
              "val": 84242000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-04-30",
              "val": 82839000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount": {
        "label": "Business Acquisition, Goodwill, Expected Tax Deductible Amount",
        "description": "The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes.",
        "units": {
          "USD": [
            {
              "end": "2013-04-30",
              "val": 20500000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25"
            },
            {
              "end": "2013-04-30",
              "val": 20500000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27"
            },
            {
              "end": "2013-04-30",
              "val": 20500000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2015-04-30",
              "val": 8000000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2022-10-31",
              "val": 67200000,
              "accn": "0001628280-22-031658",
              "fy": 2023,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2022-12-09",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2023-01-31",
              "val": 66000000,
              "accn": "0001628280-23-007473",
              "fy": 2023,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2023-03-10",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-04-30",
              "val": 200615000,
              "accn": "0001628280-24-030470",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-06-28",
              "frame": "CY2023Q1I"
            },
            {
              "end": "2024-04-30",
              "val": 186214000,
              "accn": "0001628280-24-030470",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-06-28"
            },
            {
              "end": "2024-04-30",
              "val": 186214000,
              "accn": "0001628280-25-033260",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-06-27",
              "frame": "CY2024Q1I"
            },
            {
              "end": "2025-04-30",
              "val": 171813000,
              "accn": "0001628280-25-033260",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-06-27"
            },
            {
              "end": "2025-04-30",
              "val": 171813000,
              "accn": "0000056679-26-000021",
              "fy": 2026,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-06-26",
              "frame": "CY2025Q1I"
            },
            {
              "end": "2026-04-30",
              "val": 157412000,
              "accn": "0000056679-26-000021",
              "fy": 2026,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-06-26",
              "frame": "CY2026Q1I"
            }
          ]
        }
      },
      "BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill": {
        "label": "Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill (Deprecated 2013-01-31)",
        "description": "Amount of acquisition cost of a business combination allocated to assets, excluding financial assets and goodwill, lacking physical substance.",
        "units": {
          "USD": [
            {
              "end": "2013-01-31",
              "val": 42200000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-04-30",
              "val": 42800000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "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": "2010-04-30",
              "val": 22958000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2010Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 38000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-04-30",
              "val": 38000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "end": "2013-01-31",
              "val": 32640000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-04-30",
              "val": 31506000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "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": "2014-05-01",
              "end": "2015-04-30",
              "val": 75000000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28",
              "frame": "CY2014"
            },
            {
              "start": "2014-05-01",
              "end": "2015-04-30",
              "val": 75000000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28"
            },
            {
              "start": "2015-05-01",
              "end": "2016-04-30",
              "val": 23000000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28",
              "frame": "CY2015"
            },
            {
              "start": "2015-05-01",
              "end": "2016-04-30",
              "val": 23000000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28"
            },
            {
              "start": "2015-05-01",
              "end": "2016-04-30",
              "val": 23000000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28"
            }
          ]
        }
      },
      "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": "2014-05-01",
              "end": "2015-04-30",
              "val": 1600000000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28",
              "frame": "CY2014"
            },
            {
              "start": "2014-05-01",
              "end": "2015-04-30",
              "val": 1600000000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28"
            },
            {
              "start": "2015-05-01",
              "end": "2016-04-30",
              "val": 1600000000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28",
              "frame": "CY2015"
            },
            {
              "start": "2015-05-01",
              "end": "2016-04-30",
              "val": 1600000000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28"
            },
            {
              "start": "2015-05-01",
              "end": "2016-04-30",
              "val": 1600000000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28"
            }
          ]
        }
      },
      "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": "2012-05-01",
              "end": "2013-01-31",
              "val": 2629000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12"
            },
            {
              "start": "2014-05-01",
              "end": "2015-01-31",
              "val": 445000,
              "accn": "0001193125-15-087350",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-03-11"
            },
            {
              "start": "2014-05-01",
              "end": "2015-01-31",
              "val": 445000,
              "accn": "0001193125-16-500206",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-03-10"
            },
            {
              "start": "2014-11-01",
              "end": "2015-01-31",
              "val": 445000,
              "accn": "0001193125-15-087350",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-03-11"
            },
            {
              "start": "2014-11-01",
              "end": "2015-01-31",
              "val": 445000,
              "accn": "0001193125-16-500206",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-03-10",
              "frame": "CY2014Q4"
            },
            {
              "start": "2014-05-01",
              "end": "2015-04-30",
              "val": 959000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2014"
            }
          ]
        }
      },
      "BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability": {
        "label": "Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability (Deprecated 2013-01-31)",
        "description": "This element represents the amount of any change, including any differences arising upon settlement, recognized during the reporting period in the value of a liability, arising from an item of contingent consideration, assumed in a business combination.",
        "units": {
          "USD": [
            {
              "start": "2010-05-01",
              "end": "2010-10-31",
              "val": 1878000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12"
            },
            {
              "start": "2010-08-01",
              "end": "2010-10-31",
              "val": 2196000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12",
              "frame": "CY2010Q3"
            },
            {
              "start": "2010-05-01",
              "end": "2011-01-31",
              "val": 1878000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12"
            },
            {
              "start": "2010-05-01",
              "end": "2011-04-30",
              "val": 4919000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2010"
            },
            {
              "start": "2010-05-01",
              "end": "2011-04-30",
              "val": 4919000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "start": "2011-05-01",
              "end": "2011-10-31",
              "val": 2196000,
              "accn": "0001193125-12-497094",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-12-10"
            },
            {
              "start": "2011-05-01",
              "end": "2011-10-31",
              "val": 2196000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12"
            },
            {
              "start": "2011-08-01",
              "end": "2011-10-31",
              "val": 1878000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12",
              "frame": "CY2011Q3"
            },
            {
              "start": "2011-05-01",
              "end": "2012-01-31",
              "val": 2196000,
              "accn": "0001193125-13-103009",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-03-12"
            },
            {
              "start": "2011-05-01",
              "end": "2012-01-31",
              "val": 2196000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12"
            },
            {
              "start": "2011-05-01",
              "end": "2012-04-30",
              "val": 2196000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2011"
            },
            {
              "start": "2011-05-01",
              "end": "2012-04-30",
              "val": 2196000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            }
          ]
        }
      },
      "BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1": {
        "label": "Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability",
        "description": "Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.",
        "units": {
          "USD": [
            {
              "start": "2011-05-01",
              "end": "2012-04-30",
              "val": -2196000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27",
              "frame": "CY2011"
            }
          ]
        }
      },
      "BusinessCombinationIntegrationRelatedCosts": {
        "label": "Business Combination, Integration Related Costs",
        "description": "Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.",
        "units": {
          "USD": [
            {
              "start": "2012-05-01",
              "end": "2013-01-31",
              "val": 2515000,
              "accn": "0001193125-14-093853",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-03-11"
            },
            {
              "start": "2012-11-01",
              "end": "2013-01-31",
              "val": 2515000,
              "accn": "0001193125-14-093853",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-03-11",
              "frame": "CY2012Q4"
            },
            {
              "start": "2012-05-01",
              "end": "2013-04-30",
              "val": 3106000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27",
              "frame": "CY2012"
            },
            {
              "start": "2013-05-01",
              "end": "2013-07-31",
              "val": 394000,
              "accn": "0001193125-14-336575",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-09-09",
              "frame": "CY2013Q2"
            },
            {
              "start": "2013-05-01",
              "end": "2013-07-31",
              "val": 394000,
              "accn": "0001193125-13-359698",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-09-06"
            },
            {
              "start": "2013-05-01",
              "end": "2013-10-31",
              "val": 394000,
              "accn": "0001193125-14-438860",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-12-10"
            },
            {
              "start": "2013-05-01",
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              "frame": "CY2011Q1I"
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            {
              "end": "2012-04-30",
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              "frame": "CY2012Q1I"
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            {
              "end": "2012-04-30",
              "val": 156603000,
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              "fy": 2014,
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              "form": "10-K",
              "filed": "2014-06-27",
              "frame": "CY2013Q1I"
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            {
              "end": "2013-04-30",
              "val": 169657000,
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              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25"
            },
            {
              "end": "2014-04-30",
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              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-04-30",
              "val": 179612000,
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              "fy": 2014,
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              "form": "10-K",
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            {
              "end": "2015-04-30",
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              "fy": 2015,
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              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2015Q1I"
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        "label": "Defined Benefit Plan, Plan Assets, Amount",
        "description": "Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.",
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            {
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              "form": "10-Q",
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            {
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              "fy": 2012,
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            {
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            {
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            {
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              "val": 2652000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
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              "form": "10-Q",
              "filed": "2012-03-12"
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            {
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              "accn": "0001193125-12-109821",
              "fy": 2012,
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              "form": "10-Q",
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              "fp": "Q2",
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            {
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            {
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              "val": 1064000,
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              "form": "10-Q",
              "filed": "2012-03-12",
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              "accn": "0001193125-11-244603",
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              "accn": "0001193125-11-338011",
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              "form": "10-Q",
              "filed": "2011-12-12",
              "frame": "CY2011Q3"
            },
            {
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              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12"
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        }
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              "val": 68000,
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            {
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        "label": "Depreciation",
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              "val": 17500000,
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              "fy": 2015,
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              "filed": "2016-06-28",
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              "val": 19400000,
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              "fy": 2015,
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              "form": "10-K",
              "filed": "2015-06-26"
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              "form": "10-K",
              "filed": "2017-06-28",
              "frame": "CY2014"
            },
            {
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              "val": 24500000,
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              "fy": 2016,
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              "form": "10-K",
              "filed": "2016-06-28"
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            {
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              "val": 33800000,
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              "fy": 2019,
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              "filed": "2019-06-28"
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              "fy": 2020,
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            {
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            {
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              "val": 44600000,
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            {
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            {
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              "val": 55300000,
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            {
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              "val": 74500000,
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              "fy": 2026,
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              "form": "10-K",
              "filed": "2026-06-26",
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          ]
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      },
      "DepreciationDepletionAndAmortization": {
        "label": "Depreciation, Depletion and Amortization",
        "description": "The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.",
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            {
              "end": "2014-04-30",
              "val": 45774000,
              "accn": "0001193125-15-237143",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2015-04-30",
              "val": 44128000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26"
            },
            {
              "end": "2015-04-30",
              "val": 44128000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2016-04-30",
              "val": 126644000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28"
            },
            {
              "end": "2016-04-30",
              "val": 126644000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2017-04-30",
              "val": 111242000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28"
            },
            {
              "end": "2017-04-30",
              "val": 111242000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2018-04-30",
              "val": 96504000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28"
            },
            {
              "end": "2018-04-30",
              "val": 96504000,
              "accn": "0001564590-19-024039",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-06-28",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2019-04-30",
              "val": 83022000,
              "accn": "0001564590-19-024039",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-06-28"
            },
            {
              "end": "2019-04-30",
              "val": 83022000,
              "accn": "0001564590-20-032398",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-07-15",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2020-04-30",
              "val": 112093000,
              "accn": "0001564590-20-032398",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-07-15"
            },
            {
              "end": "2020-04-30",
              "val": 112093000,
              "accn": "0001564590-21-034775",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-06-28",
              "frame": "CY2020Q1I"
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            {
              "end": "2021-04-30",
              "val": 92859000,
              "accn": "0001564590-21-034775",
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              "filed": "2021-06-28"
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            {
              "end": "2021-04-30",
              "val": 92859000,
              "accn": "0001564590-22-024447",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2022-06-28",
              "frame": "CY2021Q1I"
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            {
              "end": "2022-04-30",
              "val": 89880000,
              "accn": "0001564590-22-024447",
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              "filed": "2022-06-28"
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            {
              "end": "2022-04-30",
              "val": 89880000,
              "accn": "0001628280-23-023772",
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              "form": "10-K",
              "filed": "2023-06-28",
              "frame": "CY2022Q1I"
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            {
              "end": "2023-04-30",
              "val": 114546000,
              "accn": "0001628280-23-023772",
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              "form": "10-K",
              "filed": "2023-06-28"
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            {
              "end": "2023-04-30",
              "val": 114546000,
              "accn": "0001628280-24-030470",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2024-06-28",
              "frame": "CY2023Q1I"
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            {
              "end": "2024-04-30",
              "val": 88955000,
              "accn": "0001628280-24-030470",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-06-28"
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            {
              "end": "2024-04-30",
              "val": 88955000,
              "accn": "0001628280-25-033260",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-06-27",
              "frame": "CY2024Q1I"
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            {
              "end": "2025-04-30",
              "val": 70021000,
              "accn": "0001628280-25-033260",
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              "filed": "2025-06-27"
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            {
              "end": "2025-04-30",
              "val": 70021000,
              "accn": "0000056679-26-000021",
              "fy": 2026,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-06-26",
              "frame": "CY2025Q1I"
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            {
              "end": "2026-04-30",
              "val": 45650000,
              "accn": "0000056679-26-000021",
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              "form": "10-K",
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          ]
        }
      },
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        "units": {
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            {
              "start": "2011-05-01",
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              "val": 24,
              "accn": "0001193125-11-338011",
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              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12"
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          ],
          "Year": [
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              "start": "2011-05-01",
              "end": "2012-04-30",
              "val": 24,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2011"
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          ],
          "years": [
            {
              "start": "2011-05-01",
              "end": "2012-01-31",
              "val": 24,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12"
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          ]
        }
      },
      "FiniteLivedIntangibleAssetsUsefulLifeMinimum": {
        "label": "Finite-Lived Intangible Assets, Useful Life, Minimum (Deprecated 2012-01-31)",
        "description": "The minimum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.",
        "units": {
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              "end": "2011-07-31",
              "val": 5,
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              "frame": "CY2011Q2"
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            {
              "start": "2011-05-01",
              "end": "2011-10-31",
              "val": 5,
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          ],
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              "val": 3,
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          ],
          "years": [
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              "val": 5,
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              "form": "10-Q",
              "filed": "2012-03-12"
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          ]
        }
      },
      "FiniteLivedIntangibleAssetsWeightedAverageUsefulLife": {
        "label": "Finite-Lived Intangible Assets, Weighted-Average Useful Life (Deprecated 2012-01-31)",
        "description": "The calculated weighted-average useful life of all finite-lived intangible assets.",
        "units": {
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              "val": 16,
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              "fy": 2012,
              "fp": "FY",
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              "filed": "2012-06-22",
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      },
      "ForeignCurrencyExchangeRateRemeasurement1": {
        "label": "Foreign Currency Exchange Rate, Remeasurement",
        "description": "Foreign exchange rate used to remeasure amounts denominated in a currency other than functional currency into functional currency.",
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            {
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              "filed": "2017-06-28"
            },
            {
              "end": "2016-02-17",
              "val": 10,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
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              "filed": "2018-06-28",
              "frame": "CY2016Q1I"
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            {
              "end": "2016-02-17",
              "val": 10,
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              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28"
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          ]
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      },
      "ForeignCurrencyTransactionLossBeforeTax": {
        "label": "Foreign Currency Transaction Loss, before Tax",
        "description": "Amount before tax of foreign currency transaction realized and unrealized loss recognized in the income statement.",
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              "end": "2016-04-30",
              "val": 13720000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
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              "filed": "2018-06-28",
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            {
              "start": "2015-05-01",
              "end": "2016-04-30",
              "val": 13720000,
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              "fy": 2017,
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            {
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              "end": "2016-04-30",
              "val": 13720000,
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              "fy": 2016,
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              "form": "10-K",
              "filed": "2016-06-28"
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          ]
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      "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": {
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              "val": 28187000,
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              "end": "2012-04-30",
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              "fy": 2013,
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              "end": "2012-04-30",
              "val": 29126000,
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              "fy": 2013,
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              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
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          ]
        }
      },
      "FutureAmortizationExpenseAfterYearFive": {
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              "end": "2012-04-30",
              "val": 7892000,
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2011"
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          ]
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      "FutureAmortizationExpenseYearFive": {
        "label": "Future Amortization Expense, Year Five (Deprecated 2012-01-31)",
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        "units": {
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              "end": "2012-04-30",
              "val": 980000,
              "accn": "0001193125-12-280691",
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              "fp": "FY",
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          ]
        }
      },
      "FutureAmortizationExpenseYearFour": {
        "label": "Future Amortization Expense, Year Four (Deprecated 2012-01-31)",
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        "units": {
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              "end": "2012-04-30",
              "val": 1594000,
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              "fy": 2012,
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              "form": "10-K",
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          ]
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      },
      "FutureAmortizationExpenseYearOne": {
        "label": "Future Amortization Expense, Year One (Deprecated 2012-01-31)",
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        "units": {
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              "end": "2012-04-30",
              "val": 2183000,
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              "fy": 2012,
              "fp": "FY",
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              "filed": "2012-06-22",
              "frame": "CY2011"
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          ]
        }
      },
      "FutureAmortizationExpenseYearThree": {
        "label": "Future Amortization Expense, Year Three (Deprecated 2012-01-31)",
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        "units": {
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              "end": "2012-04-30",
              "val": 1855000,
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2011"
            }
          ]
        }
      },
      "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": {
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              "val": 2119000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2011"
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          ]
        }
      },
      "GainLossOnDispositionOfAssets": {
        "label": "Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property",
        "description": "Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.",
        "units": {
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            {
              "start": "2008-05-01",
              "end": "2009-04-30",
              "val": -3740000,
              "accn": "0000950123-11-062884",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-06-29",
              "frame": "CY2008"
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            {
              "start": "2009-05-01",
              "end": "2009-07-31",
              "val": -515000,
              "accn": "0000950123-10-084953",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2010-09-09",
              "frame": "CY2009Q2"
            },
            {
              "start": "2009-05-01",
              "end": "2009-10-31",
              "val": -437000,
              "accn": "0000950123-10-112810",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-12-10"
            },
            {
              "start": "2009-05-01",
              "end": "2010-01-31",
              "val": -202000,
              "accn": "0000950123-11-025185",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-03-14"
            },
            {
              "start": "2009-05-01",
              "end": "2010-04-30",
              "val": -323000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2009"
            },
            {
              "start": "2009-05-01",
              "end": "2010-04-30",
              "val": -323000,
              "accn": "0000950123-11-062884",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-06-29"
            },
            {
              "start": "2010-05-01",
              "end": "2010-07-31",
              "val": -60000,
              "accn": "0001193125-11-244603",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-09-09",
              "frame": "CY2010Q2"
            },
            {
              "start": "2010-05-01",
              "end": "2010-07-31",
              "val": -60000,
              "accn": "0000950123-10-084953",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2010-09-09"
            },
            {
              "start": "2010-05-01",
              "end": "2010-10-31",
              "val": -82000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12"
            },
            {
              "start": "2010-05-01",
              "end": "2010-10-31",
              "val": -82000,
              "accn": "0000950123-10-112810",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-12-10"
            },
            {
              "start": "2010-05-01",
              "end": "2011-01-31",
              "val": -77000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-03-12"
            },
            {
              "start": "2010-05-01",
              "end": "2011-01-31",
              "val": -77000,
              "accn": "0000950123-11-025185",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-03-14"
            },
            {
              "start": "2010-05-01",
              "end": "2011-04-30",
              "val": -80000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2010"
            },
            {
              "start": "2010-05-01",
              "end": "2011-04-30",
              "val": -80000,
              "accn": "0000950123-11-062884",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-06-29"
            },
            {
              "start": "2011-05-01",
              "end": "2011-07-31",
              "val": -12000,
              "accn": "0001193125-11-244603",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-09-09",
              "frame": "CY2011Q2"
            },
            {
              "start": "2011-05-01",
              "end": "2011-10-31",
              "val": 103000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12"
            },
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        "units": {
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            {
              "end": "2012-04-30",
              "val": 21619000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2013-04-30",
              "val": 20893000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2014-04-30",
              "val": 22137000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2015-04-30",
              "val": 32126000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2016-04-30",
              "val": 49396000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2017-04-30",
              "val": 50418000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2018-04-30",
              "val": 49322000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2019-04-30",
              "val": 38582000,
              "accn": "0001564590-19-024039",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-06-28"
            },
            {
              "end": "2019-04-30",
              "val": 38582000,
              "accn": "0001564590-20-032398",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-07-15",
              "frame": "CY2019Q1I"
            }
          ]
        }
      },
      "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": "2012-04-30",
              "val": 29695000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2013-04-30",
              "val": 27833000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2014-04-30",
              "val": 25329000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2015-04-30",
              "val": 35958000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2016-04-30",
              "val": 55633000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2017-04-30",
              "val": 54817000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2018-04-30",
              "val": 56634000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2019-04-30",
              "val": 45465000,
              "accn": "0001564590-19-024039",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-06-28"
            },
            {
              "end": "2019-04-30",
              "val": 45465000,
              "accn": "0001564590-20-032398",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-07-15",
              "frame": "CY2019Q1I"
            }
          ]
        }
      },
      "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": "2012-04-30",
              "val": 34609000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2013-04-30",
              "val": 37623000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2014-04-30",
              "val": 32092000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2015-04-30",
              "val": 39542000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2016-04-30",
              "val": 62257000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2017-04-30",
              "val": 57812000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2018-04-30",
              "val": 62305000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2019-04-30",
              "val": 52567000,
              "accn": "0001564590-19-024039",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-06-28"
            },
            {
              "end": "2019-04-30",
              "val": 52567000,
              "accn": "0001564590-20-032398",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-07-15",
              "frame": "CY2019Q1I"
            }
          ]
        }
      },
      "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": "2012-04-30",
              "val": 66912000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2013-04-30",
              "val": 66095000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2014-04-30",
              "val": 64395000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2015-04-30",
              "val": 137451000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2016-04-30",
              "val": 170647000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2017-04-30",
              "val": 145284000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2018-04-30",
              "val": 116186000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2019-04-30",
              "val": 74764000,
              "accn": "0001564590-19-024039",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-06-28"
            },
            {
              "end": "2019-04-30",
              "val": 74764000,
              "accn": "0001564590-20-032398",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-07-15",
              "frame": "CY2019Q1I"
            }
          ]
        }
      },
      "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.",
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              "end": "2010-04-30",
              "val": 32800000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2009"
            },
            {
              "start": "2010-05-01",
              "end": "2011-04-30",
              "val": 32400000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "start": "2010-05-01",
              "end": "2011-04-30",
              "val": 32400000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2010"
            },
            {
              "start": "2011-05-01",
              "end": "2012-04-30",
              "val": 35500000,
              "accn": "0001193125-12-280691",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22"
            },
            {
              "start": "2011-05-01",
              "end": "2012-04-30",
              "val": 35500000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25"
            },
            {
              "start": "2011-05-01",
              "end": "2012-04-30",
              "val": 35500000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27",
              "frame": "CY2011"
            },
            {
              "start": "2012-05-01",
              "end": "2013-04-30",
              "val": 38400000,
              "accn": "0001193125-13-270364",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-06-25"
            },
            {
              "start": "2012-05-01",
              "end": "2013-04-30",
              "val": 38400000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27"
            },
            {
              "start": "2012-05-01",
              "end": "2013-04-30",
              "val": 38400000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-05-01",
              "end": "2014-04-30",
              "val": 39600000,
              "accn": "0001193125-14-253292",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-06-27"
            },
            {
              "start": "2013-05-01",
              "end": "2014-04-30",
              "val": 39600000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26"
            },
            {
              "start": "2013-05-01",
              "end": "2014-04-30",
              "val": 39600000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28",
              "frame": "CY2013"
            },
            {
              "start": "2014-05-01",
              "end": "2015-04-30",
              "val": 38000000,
              "accn": "0001193125-15-237143",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-06-26"
            },
            {
              "start": "2014-05-01",
              "end": "2015-04-30",
              "val": 38000000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28"
            },
            {
              "start": "2014-05-01",
              "end": "2015-04-30",
              "val": 38000000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28",
              "frame": "CY2014"
            },
            {
              "start": "2015-05-01",
              "end": "2016-04-30",
              "val": 45500000,
              "accn": "0001193125-16-634657",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-06-28"
            },
            {
              "start": "2015-05-01",
              "end": "2016-04-30",
              "val": 45500000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28"
            },
            {
              "start": "2015-05-01",
              "end": "2016-04-30",
              "val": 45500000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28",
              "frame": "CY2015"
            },
            {
              "start": "2016-05-01",
              "end": "2017-04-30",
              "val": 56800000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28"
            },
            {
              "start": "2016-05-01",
              "end": "2017-04-30",
              "val": 56800000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28"
            },
            {
              "start": "2016-05-01",
              "end": "2017-04-30",
              "val": 56800000,
              "accn": "0001564590-19-024039",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-06-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-05-01",
              "end": "2018-04-30",
              "val": 57600000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-06-28"
            },
            {
              "start": "2017-05-01",
              "end": "2018-04-30",
              "val": 57600000,
              "accn": "0001564590-19-024039",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-06-28"
            },
            {
              "start": "2017-05-01",
              "end": "2018-04-30",
              "val": 57600000,
              "accn": "0001564590-20-032398",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-07-15",
              "frame": "CY2017"
            },
            {
              "start": "2018-05-01",
              "end": "2019-04-30",
              "val": 58200000,
              "accn": "0001564590-19-024039",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-06-28"
            },
            {
              "start": "2018-05-01",
              "end": "2019-04-30",
              "val": 58200000,
              "accn": "0001564590-20-032398",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-07-15"
            },
            {
              "start": "2018-05-01",
              "end": "2019-04-30",
              "val": 58200000,
              "accn": "0001564590-21-034775",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-06-28",
              "frame": "CY2018"
            }
          ]
        }
      },
      "OperatingLeaseWeightedAverageDiscountRatePercent": {
        "label": "Operating Lease, Weighted Average Discount Rate, Percent",
        "description": "Weighted average discount rate for operating lease calculated at point in time.",
        "units": {
          "pure": [
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              "end": "2019-07-31",
              "val": 0.048,
              "accn": "0001564590-19-034253",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-09-06",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-10-31",
              "val": 0.049,
              "accn": "0001564590-19-045456",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-12-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2020-01-31",
              "val": 0.048,
              "accn": "0001564590-20-010042",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-03-11",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-04-30",
              "val": 0.048,
              "accn": "0001564590-20-032398",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-07-15"
            },
            {
              "end": "2020-04-30",
              "val": 0.048,
              "accn": "0001564590-20-042790",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-09-08"
            },
            {
              "end": "2020-04-30",
              "val": 0.048,
              "accn": "0001564590-20-056543",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-12-09"
            },
            {
              "end": "2020-04-30",
              "val": 0.048,
              "accn": "0001564590-21-012459",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-03-11"
            },
            {
              "end": "2020-04-30",
              "val": 0.048,
              "accn": "0001564590-21-034775",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-06-28",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-07-31",
              "val": 0.048,
              "accn": "0001564590-20-042790",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-09-08",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-10-31",
              "val": 0.048,
              "accn": "0001564590-20-056543",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-12-09",
              "frame": "CY2020Q3I"
            },
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      "OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax": {
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            {
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              "end": "2016-04-30",
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            {
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            {
              "end": "2017-01-31",
              "val": 5000000,
              "accn": "0001193125-17-078657",
              "fy": 2017,
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              "form": "10-Q",
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            {
              "end": "2017-04-30",
              "val": 4600000,
              "accn": "0001193125-17-216289",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28"
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            {
              "end": "2017-04-30",
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            {
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            {
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            {
              "end": "2017-10-31",
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              "accn": "0001193125-17-364804",
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            {
              "end": "2018-01-31",
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              "fy": 2020,
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              "filed": "2020-07-15",
              "frame": "CY2019Q1I"
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            {
              "end": "2020-01-31",
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            {
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            {
              "end": "2020-04-30",
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              "filed": "2021-06-28",
              "frame": "CY2020Q1I"
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            {
              "end": "2020-07-31",
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              "accn": "0001564590-20-042790",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
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            {
              "end": "2020-10-31",
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              "fy": 2021,
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              "end": "2021-01-31",
              "val": 600000,
              "accn": "0001564590-21-012459",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-03-11",
              "frame": "CY2020Q4I"
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            {
              "end": "2021-04-30",
              "val": 600000,
              "accn": "0001564590-21-034775",
              "fy": 2021,
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              "form": "10-K",
              "filed": "2021-06-28"
            },
            {
              "end": "2021-04-30",
              "val": 600000,
              "accn": "0001564590-21-047315",
              "fy": 2022,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-09-08"
            },
            {
              "end": "2021-04-30",
              "val": 600000,
              "accn": "0001564590-21-059850",
              "fy": 2022,
              "fp": "Q2",
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              "filed": "2021-12-09"
            },
            {
              "end": "2021-04-30",
              "val": 600000,
              "accn": "0001564590-22-009806",
              "fy": 2022,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2022-03-11"
            },
            {
              "end": "2021-04-30",
              "val": 600000,
              "accn": "0001564590-22-024447",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-06-28",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-07-31",
              "val": 600000,
              "accn": "0001564590-21-047315",
              "fy": 2022,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-09-08",
              "frame": "CY2021Q2I"
            },
            {
              "end": "2021-10-31",
              "val": 500000,
              "accn": "0001564590-21-059850",
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              "fp": "Q2",
              "form": "10-Q",
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              "frame": "CY2021Q3I"
            },
            {
              "end": "2022-01-31",
              "val": 500000,
              "accn": "0001564590-22-009806",
              "fy": 2022,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2022-03-11",
              "frame": "CY2021Q4I"
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            {
              "end": "2022-04-30",
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              "accn": "0001564590-22-024447",
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          ]
        }
      },
      "RestructuringReservePeriodIncreaseDecrease": {
        "label": "Restructuring Reserve, Period Increase (Decrease)",
        "description": "Amount of increase (decrease) in the accrual for restructuring costs.",
        "units": {
          "USD": [
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              "end": "2010-04-30",
              "val": -5100000,
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              "filed": "2012-06-22",
              "frame": "CY2009"
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            {
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              "end": "2017-01-31",
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          ]
        }
      },
      "RestructuringReserveSettledWithCash": {
        "label": "Restructuring Reserve, Settled With Cash (Deprecated 2013-01-31)",
        "description": "Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.",
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              "frame": "CY2010"
            },
            {
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              "form": "10-Q",
              "filed": "2011-09-09",
              "frame": "CY2011Q2"
            },
            {
              "start": "2011-05-01",
              "end": "2011-10-31",
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            },
            {
              "start": "2011-08-01",
              "end": "2011-10-31",
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              "filed": "2011-12-12",
              "frame": "CY2011Q3"
            },
            {
              "start": "2011-05-01",
              "end": "2012-01-31",
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              "fy": 2012,
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              "form": "10-Q",
              "filed": "2012-03-12"
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            {
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              "end": "2012-01-31",
              "val": 639000,
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              "form": "10-Q",
              "filed": "2012-03-12",
              "frame": "CY2011Q4"
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            {
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              "end": "2012-04-30",
              "val": 2910000,
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              "form": "10-K",
              "filed": "2013-06-25",
              "frame": "CY2011"
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            {
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              "end": "2012-04-30",
              "val": 2910000,
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            {
              "start": "2012-05-01",
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              "val": 13998000,
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              "fy": 2013,
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              "filed": "2013-06-25",
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      "RestructuringReserveSettledWithoutCash1": {
        "label": "Restructuring Reserve, Settled without Cash (Deprecated 2016-01-31)",
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            {
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          ]
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      },
      "RestructuringReserveSettledWithoutCash2": {
        "label": "Restructuring Reserve, Settled without Cash",
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        "units": {
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              "filed": "2016-06-28"
            },
            {
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              "val": 1843000,
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              "filed": "2017-06-28",
              "frame": "CY2015"
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            {
              "start": "2016-05-01",
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              "val": 2480000,
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              "form": "10-Q",
              "filed": "2016-09-09",
              "frame": "CY2016Q2"
            },
            {
              "start": "2016-05-01",
              "end": "2016-10-31",
              "val": 2480000,
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              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-12-09"
            },
            {
              "start": "2016-05-01",
              "end": "2017-01-31",
              "val": 1896000,
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              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-03-10"
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            {
              "start": "2016-05-01",
              "end": "2017-04-30",
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              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-06-28"
            },
            {
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              "end": "2017-04-30",
              "val": 2024000,
              "accn": "0001193125-18-207569",
              "fy": 2018,
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              "form": "10-K",
              "filed": "2018-06-28",
              "frame": "CY2016"
            },
            {
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              "end": "2019-04-30",
              "val": 171000,
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              "fy": 2020,
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              "form": "10-K",
              "filed": "2020-07-15",
              "frame": "CY2018"
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            {
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              "end": "2020-01-31",
              "val": 1284000,
              "accn": "0001564590-20-010042",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-03-11"
            },
            {
              "start": "2019-11-01",
              "end": "2020-01-31",
              "val": 1284000,
              "accn": "0001564590-20-010042",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-03-11",
              "frame": "CY2019Q4"
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            {
              "start": "2019-05-01",
              "end": "2020-04-30",
              "val": 8053000,
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              "fy": 2020,
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              "form": "10-K",
              "filed": "2020-07-15"
            },
            {
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              "end": "2020-04-30",
              "val": 8053000,
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              "form": "10-K",
              "filed": "2021-06-28"
            },
            {
              "start": "2019-05-01",
              "end": "2020-04-30",
              "val": 8053000,
              "accn": "0001564590-22-024447",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-06-28",
              "frame": "CY2019"
            },
            {
              "start": "2020-05-01",
              "end": "2020-07-31",
              "val": 3968000,
              "accn": "0001564590-20-042790",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-09-08",
              "frame": "CY2020Q2"
            },
            {
              "start": "2020-05-01",
              "end": "2020-10-31",
              "val": 3968000,
              "accn": "0001564590-20-056543",
              "fy": 2021,
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              "form": "10-Q",
              "filed": "2020-12-09"
            },
            {
              "start": "2020-05-01",
              "end": "2021-01-31",
              "val": 3968000,
              "accn": "0001564590-21-012459",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-03-11"
            },
            {
              "start": "2020-05-01",
              "end": "2021-04-30",
              "val": 3968000,
              "accn": "0001564590-21-034775",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-06-28"
            },
            {
              "start": "2020-05-01",
              "end": "2021-04-30",
              "val": 3968000,
              "accn": "0001564590-22-024447",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-06-28",
              "frame": "CY2020"
            },
            {
              "start": "2023-05-01",
              "end": "2023-10-31",
              "val": 15421000,
              "accn": "0001628280-23-041146",
              "fy": 2024,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2023-12-08"
            },
            {
              "start": "2023-08-01",
              "end": "2023-10-31",
              "val": 15421000,
              "accn": "0001628280-23-041146",
              "fy": 2024,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2023-12-08",
              "frame": "CY2023Q3"
            },
            {
              "start": "2023-05-01",
              "end": "2024-01-31",
              "val": 15421000,
              "accn": "0001628280-24-009912",
              "fy": 2024,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2024-03-08"
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          ]
        }
      },
      "RestructuringReserveTranslationAdjustment": {
        "label": "Restructuring Reserve, Foreign Currency Translation Gain (Loss)",
        "description": "Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.",
        "units": {
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              "end": "2011-04-30",
              "val": 479000,
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-06-22",
              "frame": "CY2010"
            },
            {
              "start": "2011-05-01",
              "end": "2011-07-31",
              "val": -74000,
              "accn": "0001193125-11-244603",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-09-09",
              "frame": "CY2011Q2"
            },
            {
              "start": "2011-05-01",
              "end": "2011-10-31",
              "val": -138000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12"
            },
            {
              "start": "2011-08-01",
              "end": "2011-10-31",
              "val": -64000,
              "accn": "0001193125-11-338011",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-12-12",
              "frame": "CY2011Q3"
            },
            {
              "start": "2011-05-01",
              "end": "2012-01-31",
              "val": -243000,
              "accn": "0001193125-12-109821",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
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          ]
        }
      },
      "EffectiveIncomeTaxRateReconciliationCrossBorderTaxEffectPercent": {
        "label": "",
        "description": "",
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      },
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        "units": {
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      },
      "IncomeTaxPaidFederalAfterRefundReceived": {
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        "units": {
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        "units": {
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        "units": {
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        "units": {
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              "start": "2025-05-01",
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        "units": {
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  }
}