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              "end": "2018-12-31",
              "val": 2255000,
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            },
            {
              "end": "2016-07-03",
              "val": 82803000,
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              "fy": 2016,
              "fp": "Q2",
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              "filed": "2016-08-01",
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            },
            {
              "end": "2016-10-02",
              "val": 123815000,
              "accn": "0000851205-16-000038",
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            {
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              "accn": "0000851205-17-000003",
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              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-04-02",
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              "accn": "0000851205-17-000006",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-01",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2017-07-02",
              "val": 285915000,
              "accn": "0000851205-17-000013",
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            },
            {
              "end": "2017-10-01",
              "val": 171009000,
              "accn": "0000851205-17-000016",
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            {
              "end": "2017-12-31",
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              "accn": "0000851205-18-000004",
              "fy": 2017,
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              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-04-01",
              "val": 388798000,
              "accn": "0000851205-18-000007",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-30",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2018-07-01",
              "val": 350445000,
              "accn": "0000851205-18-000013",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-30",
              "frame": "CY2018Q2I"
            },
            {
              "end": "2018-09-30",
              "val": 317195000,
              "accn": "0000851205-18-000016",
              "fy": 2018,
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              "form": "10-Q",
              "filed": "2018-10-29",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2018-12-31",
              "val": 318908000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 141814000,
              "accn": "0000851205-19-000006",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-04-29",
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            },
            {
              "end": "2019-06-30",
              "val": 61379000,
              "accn": "0000851205-19-000010",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-07-29",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-29",
              "val": 160738000,
              "accn": "0000851205-19-000012",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 60547000,
              "accn": "0000851205-20-000002",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-13",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-29",
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              "accn": "0000851205-20-000004",
              "fy": 2020,
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              "form": "10-Q",
              "filed": "2020-04-27",
              "frame": "CY2020Q1I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value",
        "description": "This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer.",
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              "filed": "2011-11-01",
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            {
              "end": "2011-12-31",
              "val": 8596000,
              "accn": "0001193125-12-049244",
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              "end": "2013-12-31",
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              "fy": 2013,
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              "filed": "2014-02-13",
              "frame": "CY2013Q4I"
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            {
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            },
            {
              "end": "2014-09-28",
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            {
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            },
            {
              "end": "2015-12-31",
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            {
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            {
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            },
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            },
            {
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            {
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            },
            {
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              "form": "10-Q",
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            },
            {
              "end": "2019-09-29",
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              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-10-28",
              "frame": "CY2019Q3I"
            },
            {
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              "filed": "2020-04-27",
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        }
      },
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        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10",
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            {
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              "end": "2020-03-29",
              "val": 15000,
              "accn": "0000851205-20-000004",
              "fy": 2020,
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              "form": "10-Q",
              "filed": "2020-04-27"
            },
            {
              "start": "2020-01-01",
              "end": "2020-03-29",
              "val": 15000,
              "accn": "0000851205-21-000010",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
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              "frame": "CY2020Q1"
            },
            {
              "start": "2020-01-01",
              "end": "2020-06-28",
              "val": 21000,
              "accn": "0000851205-20-000011",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-29"
            },
            {
              "start": "2020-01-01",
              "end": "2020-06-28",
              "val": 21000,
              "accn": "0000851205-21-000020",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-08-05"
            },
            {
              "start": "2020-03-30",
              "end": "2020-06-28",
              "val": 7000,
              "accn": "0000851205-20-000011",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-29"
            },
            {
              "start": "2020-03-30",
              "end": "2020-06-28",
              "val": 7000,
              "accn": "0000851205-21-000020",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
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              "frame": "CY2020Q2"
            },
            {
              "start": "2020-01-01",
              "end": "2020-09-27",
              "val": 22000,
              "accn": "0000851205-20-000016",
              "fy": 2020,
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            },
            {
              "start": "2020-06-29",
              "end": "2020-09-27",
              "val": 1000,
              "accn": "0000851205-20-000016",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-28",
              "frame": "CY2020Q3"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 164000,
              "accn": "0000851205-21-000005",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-11",
              "frame": "CY2020"
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            {
              "start": "2021-01-01",
              "end": "2021-04-04",
              "val": 0,
              "accn": "0000851205-21-000010",
              "fy": 2021,
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              "form": "10-Q",
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              "frame": "CY2021Q1"
            },
            {
              "start": "2021-01-01",
              "end": "2021-07-04",
              "val": 0,
              "accn": "0000851205-21-000020",
              "fy": 2021,
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            {
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              "end": "2021-07-04",
              "val": 0,
              "accn": "0000851205-21-000020",
              "fy": 2021,
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              "form": "10-Q",
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              "frame": "CY2021Q2"
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        }
      },
      "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.",
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              "end": "2011-07-03",
              "val": -776000,
              "accn": "0000950123-11-071059",
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            {
              "end": "2011-10-02",
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            {
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            {
              "end": "2012-07-01",
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            {
              "end": "2012-09-30",
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            {
              "end": "2012-12-31",
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        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses (Deprecated 2012-01-31)",
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      "AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses1": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses (Deprecated 2012-01-31)",
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      "AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses1": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses (Deprecated 2012-01-31)",
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      "AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses (Deprecated 2013-01-31)",
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      "AvailableforsaleSecuritiesGrossUnrealizedGain": {
        "label": "Available-for-sale Securities, Gross Unrealized Gains (Deprecated 2013-01-31)",
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      "BusinessCombinationConsiderationTransferred1": {
        "label": "Business Combination, Consideration Transferred",
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      "BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1": {
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            {
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              "accn": "0000851205-16-000035",
              "fy": 2016,
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            {
              "start": "2016-01-01",
              "end": "2016-07-03",
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            {
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            {
              "start": "2016-01-01",
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              "fy": 2017,
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            {
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              "val": -463000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
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              "filed": "2017-02-16"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": -463000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
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            },
            {
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              "accn": "0000851205-17-000006",
              "fy": 2017,
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            },
            {
              "start": "2017-01-01",
              "end": "2017-04-02",
              "val": -275000,
              "accn": "0000851205-18-000007",
              "fy": 2018,
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            {
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              "accn": "0000851205-17-000013",
              "fy": 2017,
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            },
            {
              "start": "2017-01-01",
              "end": "2017-07-02",
              "val": -151000,
              "accn": "0000851205-18-000013",
              "fy": 2018,
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            {
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              "end": "2017-10-01",
              "val": 88000,
              "accn": "0000851205-17-000016",
              "fy": 2017,
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              "form": "10-Q",
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            {
              "start": "2017-01-01",
              "end": "2017-10-01",
              "val": 88000,
              "accn": "0000851205-18-000016",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-29"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": -28000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": -28000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": -28000,
              "accn": "0000851205-20-000002",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-13",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-04-01",
              "val": -442000,
              "accn": "0000851205-18-000007",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-30"
            },
            {
              "start": "2018-01-01",
              "end": "2018-04-01",
              "val": -442000,
              "accn": "0000851205-19-000006",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29",
              "frame": "CY2018Q1"
            },
            {
              "start": "2018-01-01",
              "end": "2018-07-01",
              "val": -254000,
              "accn": "0000851205-18-000013",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-30"
            },
            {
              "start": "2018-01-01",
              "end": "2018-07-01",
              "val": -254000,
              "accn": "0000851205-19-000010",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-29"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": -50000,
              "accn": "0000851205-18-000016",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-29"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": -50000,
              "accn": "0000851205-19-000012",
              "fy": 2019,
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            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": -3000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
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              "filed": "2019-02-14"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": -3000,
              "accn": "0000851205-20-000002",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-13"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": -3000,
              "accn": "0000851205-21-000005",
              "fy": 2020,
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              "filed": "2021-02-11",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-03-31",
              "val": -985000,
              "accn": "0000851205-19-000006",
              "fy": 2019,
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            {
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              "accn": "0000851205-20-000004",
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            {
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              "val": -863000,
              "accn": "0000851205-19-000010",
              "fy": 2019,
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            {
              "start": "2019-01-01",
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              "val": -863000,
              "accn": "0000851205-20-000011",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-29"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-29",
              "val": -1401000,
              "accn": "0000851205-19-000012",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-29",
              "val": -1401000,
              "accn": "0000851205-20-000016",
              "fy": 2020,
              "fp": "Q3",
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              "filed": "2020-10-28"
            },
            {
              "start": "2019-01-01",
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              "val": -1401000,
              "accn": "0000851205-20-000002",
              "fy": 2019,
              "fp": "FY",
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              "filed": "2020-02-13"
            },
            {
              "start": "2019-01-01",
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              "val": -1401000,
              "accn": "0000851205-21-000005",
              "fy": 2020,
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              "filed": "2021-02-11"
            },
            {
              "start": "2019-01-01",
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              "val": -1401000,
              "accn": "0000851205-22-000008",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-17",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
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              "val": 0,
              "accn": "0000851205-20-000004",
              "fy": 2020,
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              "form": "10-Q",
              "filed": "2020-04-27",
              "frame": "CY2020Q1"
            },
            {
              "start": "2020-01-01",
              "end": "2020-06-28",
              "val": -114000,
              "accn": "0000851205-20-000011",
              "fy": 2020,
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              "filed": "2020-07-29"
            },
            {
              "start": "2020-01-01",
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              "val": -114000,
              "accn": "0000851205-21-000020",
              "fy": 2021,
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              "filed": "2021-08-05"
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            {
              "start": "2020-01-01",
              "end": "2020-09-27",
              "val": -114000,
              "accn": "0000851205-20-000016",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-28"
            },
            {
              "start": "2020-01-01",
              "end": "2020-09-27",
              "val": -114000,
              "accn": "0000851205-21-000024",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-11-04"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": -114000,
              "accn": "0000851205-21-000005",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-11"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": -114000,
              "accn": "0000851205-22-000008",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-17"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": -114000,
              "accn": "0000851205-23-000004",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-16",
              "frame": "CY2020"
            },
            {
              "start": "2021-01-01",
              "end": "2021-07-04",
              "val": 0,
              "accn": "0000851205-21-000020",
              "fy": 2021,
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              "filed": "2021-08-05"
            },
            {
              "start": "2021-01-01",
              "end": "2021-10-03",
              "val": 0,
              "accn": "0000851205-21-000024",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-11-04"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 0,
              "accn": "0000851205-22-000008",
              "fy": 2021,
              "fp": "FY",
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              "filed": "2022-02-17"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 0,
              "accn": "0000851205-23-000004",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-16",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
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              "val": 0,
              "accn": "0000851205-23-000004",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-16",
              "frame": "CY2022"
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          ]
        }
      },
      "BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh": {
        "label": "Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High",
        "description": "For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.",
        "units": {
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              "val": 5000000,
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              "fy": 2015,
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              "filed": "2016-02-10"
            },
            {
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              "val": 5000000,
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              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-11-02",
              "frame": "CY2015Q3I"
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          ]
        }
      },
      "BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow": {
        "label": "Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low",
        "description": "For contingent consideration arrangements and indemnification assets recognized in connection with a business combination, this element represents an estimate of the low-end of the potential range (undiscounted) of the consideration which may be paid.",
        "units": {
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              "filed": "2016-02-10"
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            {
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              "accn": "0000851205-15-000024",
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        }
      },
      "BusinessCombinationContingentConsiderationLiability": {
        "label": "Business Combination, Contingent Consideration, Liability",
        "description": "Amount of liability recognized arising from contingent consideration in a business combination.",
        "units": {
          "USD": [
            {
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              "val": 3000000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
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              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
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          ]
        }
      },
      "BusinessCombinationContingentConsiderationLiabilityCurrent": {
        "label": "Business Combination, Contingent Consideration, Liability, Current",
        "description": "Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.",
        "units": {
          "USD": [
            {
              "end": "2015-10-04",
              "val": 938000,
              "accn": "0000851205-15-000024",
              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-11-02",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2015-12-31",
              "val": 600000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
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          ]
        }
      },
      "BusinessCombinationContingentConsiderationLiabilityNoncurrent": {
        "label": "Business Combination, Contingent Consideration, Liability, Noncurrent",
        "description": "Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled beyond one year or the normal operating cycle, if longer.",
        "units": {
          "USD": [
            {
              "end": "2015-10-04",
              "val": 2852000,
              "accn": "0000851205-15-000024",
              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-11-02",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2015-12-31",
              "val": 2400000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
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          ]
        }
      },
      "BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized": {
        "label": "Business Combination, Liabilities Arising from Contingencies, Amount Recognized",
        "description": "The amount, measured at acquisition-date fair value, of all liabilities assumed that arise from contingencies and were recognized by the entity.",
        "units": {
          "USD": [
            {
              "end": "2015-08-21",
              "val": 3790000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10"
            },
            {
              "end": "2015-10-04",
              "val": 3790000,
              "accn": "0000851205-15-000024",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-02",
              "frame": "CY2015Q3I"
            }
          ]
        }
      },
      "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets": {
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets",
        "description": "Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.",
        "units": {
          "USD": [
            {
              "end": "2015-08-21",
              "val": 23000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10"
            },
            {
              "end": "2015-10-04",
              "val": 23000,
              "accn": "0000851205-15-000024",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-02",
              "frame": "CY2015Q3I"
            }
          ]
        }
      },
      "BusinessCombinationSeparatelyRecognizedTransactionsLiabilitiesRecognized": {
        "label": "Business Combination, Separately Recognized Transactions, Liabilities Recognized",
        "description": "The amount of liabilities recognized recorded in a transaction with the acquiree for each transaction that is recognized separately from the acquisition of assets and assumptions of liabilities in the business combination.",
        "units": {
          "USD": [
            {
              "end": "2016-12-31",
              "val": 2115000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 6022000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15"
            },
            {
              "end": "2017-12-31",
              "val": 6022000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 431000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14"
            },
            {
              "end": "2018-12-31",
              "val": 1706000,
              "accn": "0000851205-20-000002",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-13",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 2103000,
              "accn": "0000851205-20-000002",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-13",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "CapitalExpenditureDiscontinuedOperations": {
        "label": "Capital Expenditure, Discontinued Operations",
        "description": "Amount of capital expenditure attributable to discontinued operations.",
        "units": {
          "USD": [
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              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 749000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-29",
              "val": 261000,
              "accn": "0000851205-15-000020",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-08-03"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-28",
              "val": 467000,
              "accn": "0000851205-15-000024",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-02"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 631000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 631000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-04-05",
              "val": 311000,
              "accn": "0000851205-16-000030",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-05-02",
              "frame": "CY2015Q1"
            },
            {
              "start": "2015-01-01",
              "end": "2015-07-05",
              "val": 482000,
              "accn": "0000851205-15-000020",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-08-03"
            },
            {
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              "val": 482000,
              "accn": "0000851205-16-000035",
              "fy": 2016,
              "fp": "Q2",
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              "filed": "2016-08-01"
            },
            {
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              "end": "2015-10-04",
              "val": 482000,
              "accn": "0000851205-15-000024",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-02"
            },
            {
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              "end": "2015-10-04",
              "val": 482000,
              "accn": "0000851205-16-000038",
              "fy": 2016,
              "fp": "Q3",
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              "filed": "2016-10-31"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 482000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 482000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 482000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-04-03",
              "val": 0,
              "accn": "0000851205-16-000030",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-05-02",
              "frame": "CY2016Q1"
            },
            {
              "start": "2016-01-01",
              "end": "2016-07-03",
              "val": 0,
              "accn": "0000851205-16-000035",
              "fy": 2016,
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            {
              "end": "2013-09-29",
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              "end": "2013-12-31",
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              "end": "2013-12-31",
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              "end": "2015-12-31",
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            {
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              "end": "2016-04-03",
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              "fy": 2016,
              "fp": "Q1",
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              "frame": "CY2016Q1I"
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            {
              "end": "2016-07-03",
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            },
            {
              "end": "2016-10-02",
              "val": 0,
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              "fy": 2016,
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            {
              "end": "2016-12-31",
              "val": 0,
              "accn": "0000851205-17-000003",
              "fy": 2016,
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              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
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          ]
        }
      },
      "CostMethodInvestmentsAggregateCarryingAmount": {
        "label": "Cost-method Investments, Aggregate Carrying Amount (Deprecated 2013-01-31)",
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              "fy": 2012,
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              "filed": "2013-02-11",
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        }
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      "CostMethodInvestmentsFairValueDisclosure": {
        "label": "Cost Method Investments, Fair Value Disclosure",
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        "label": "Cost of Goods and Services Sold",
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              "val": 28440000,
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              "filed": "2010-08-02",
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              "val": 40478000,
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            {
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            {
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            {
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            {
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            {
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            {
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        "label": "Gain (Loss) on Disposition of Business",
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            {
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        }
      },
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        "label": "Goodwill, Impairment Loss",
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      "GoodwillTranslationAdjustments": {
        "label": "Goodwill, Translation Adjustments (Deprecated 2016-01-31)",
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        }
      },
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      },
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        "label": "Liabilities",
        "description": "Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future.",
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              "val": 5315000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 4110000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 5054000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 5762000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 7086000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInFiveYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Five Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 908000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 708000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 775000,
              "accn": "0001193125-14-051054",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-13",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 1416000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 1308000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 1735000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 1219000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 2209000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInFourYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Four Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 1281000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 1392000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 1416000,
              "accn": "0001193125-14-051054",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-13",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 1490000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 1571000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 1853000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 2371000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 2918000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInThreeYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Three Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 1821000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 2265000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 2480000,
              "accn": "0001193125-14-051054",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-13",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 2050000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 2197000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 2164000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 2962000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 4109000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInTwoYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Two Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 2273000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 3686000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 4259000,
              "accn": "0001193125-14-051054",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-13",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 3309000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 2739000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 3303000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 4087000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 5227000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueThereafter": {
        "label": "Operating Leases, Future Minimum Payments, Due Thereafter",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 1479000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 1050000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 2153000,
              "accn": "0001193125-14-051054",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-13",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 2217000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 2453000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 1498000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 865000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 1198000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivable": {
        "label": "Operating Leases, Future Minimum Payments Receivable",
        "description": "Future minimum rental payments in aggregate as of the balance sheet date under operating leases.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 4287000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 3267000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 9601000,
              "accn": "0001193125-14-051054",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-13",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 8229000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 6551000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 2629000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 3342000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 1228000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableCurrent": {
        "label": "Operating Leases, Future Minimum Payments Receivable, Current",
        "description": "Future rental payments receivable within one year of the balance sheet date under an operating lease.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 767000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 679000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 1408000,
              "accn": "0001193125-14-051054",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-13",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 1678000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 1675000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 812000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 835000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears": {
        "label": "Operating Leases, Future Minimum Payments Receivable, in Five Years",
        "description": "Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 682000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 432000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 1009000,
              "accn": "0001193125-14-051054",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-13",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 1035000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 1061000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 187000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 305000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 307000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableInFourYears": {
        "label": "Operating Leases, Future Minimum Payments Receivable, in Four Years",
        "description": "Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 748000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 703000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11",
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            },
            {
              "end": "2013-12-31",
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              "accn": "0001193125-14-051054",
              "fy": 2013,
              "fp": "FY",
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            },
            {
              "end": "2014-12-31",
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              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
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              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 1035000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
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              "filed": "2016-02-10",
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            },
            {
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              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
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              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
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            {
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              "val": 307000,
              "accn": "0000851205-19-000003",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
              "frame": "CY2018Q4I"
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          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears": {
        "label": "Operating Leases, Future Minimum Payments Receivable, in Three Years",
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            {
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            {
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            {
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              "fy": 2014,
              "fp": "FY",
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              "filed": "2015-02-12",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 1009000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
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            {
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              "accn": "0000851205-17-000003",
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              "fp": "FY",
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              "filed": "2017-02-16",
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            {
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              "filed": "2019-02-14",
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          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears": {
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            {
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              "accn": "0001193125-13-048665",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
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              "accn": "0001193125-14-051054",
              "fy": 2013,
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            {
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            {
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              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 848000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 307000,
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              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-14",
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          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableThereafter": {
        "label": "Operating Leases, Future Minimum Payments Receivable, Thereafter",
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            {
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              "filed": "2016-02-10",
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              "filed": "2018-02-15",
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        "label": "Operating Leases, Income Statement, Lease Revenue",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09"
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            {
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              "filed": "2014-02-13",
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            {
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              "accn": "0000851205-15-000003",
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              "form": "10-K",
              "filed": "2015-02-12"
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            {
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              "filed": "2017-02-16",
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            },
            {
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              "accn": "0000851205-16-000027",
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              "filed": "2016-02-10"
            },
            {
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              "end": "2015-12-31",
              "val": 1921000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16"
            },
            {
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              "end": "2015-12-31",
              "val": 1921000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15",
              "frame": "CY2015"
            },
            {
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              "end": "2016-12-31",
              "val": 1911000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-16"
            },
            {
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              "filed": "2018-02-15"
            },
            {
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              "fp": "FY",
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              "filed": "2019-02-14",
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            },
            {
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              "fy": 2017,
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              "form": "10-K",
              "filed": "2018-02-15"
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            {
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              "filed": "2019-02-14",
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            },
            {
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              "fy": 2018,
              "fp": "FY",
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              "filed": "2019-02-14",
              "frame": "CY2018"
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          ]
        }
      },
      "OperatingLeasesRentExpenseNet": {
        "label": "Operating Leases, Rent Expense, Net",
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              "form": "10-K",
              "filed": "2012-02-09"
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            },
            {
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              "filed": "2016-02-10",
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            },
            {
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              "accn": "0000851205-15-000003",
              "fy": 2014,
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              "filed": "2015-02-12"
            },
            {
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              "end": "2014-12-31",
              "val": 5560000,
              "accn": "0000851205-16-000027",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-10"
            },
            {
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            },
            {
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            },
            {
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              "filed": "2018-02-15",
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            },
            {
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              "filed": "2017-02-16"
            },
            {
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            {
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              "filed": "2019-02-14",
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            {
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            {
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            {
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            {
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            {
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            {
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              "accn": "0000851205-16-000035",
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            {
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              "val": 18941000,
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            {
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              "val": 47149000,
              "accn": "0000851205-17-000003",
              "fy": 2016,
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              "filed": "2017-02-16"
            },
            {
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              "val": 47149000,
              "accn": "0000851205-18-000004",
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            {
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            },
            {
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              "end": "2017-04-02",
              "val": 30067000,
              "accn": "0000851205-17-000006",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-01",
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            },
            {
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              "end": "2017-07-02",
              "val": 62343000,
              "accn": "0000851205-17-000013",
              "fy": 2017,
              "fp": "Q2",
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            },
            {
              "start": "2017-01-01",
              "end": "2017-10-01",
              "val": 99347000,
              "accn": "0000851205-17-000016",
              "fy": 2017,
              "fp": "Q3",
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              "filed": "2017-10-30"
            },
            {
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              "val": 123715000,
              "accn": "0000851205-18-000004",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-15"
            },
            {
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              "val": 123715000,
              "accn": "0000851205-19-000003",
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            },
            {
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              "filed": "2020-02-13",
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            },
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              "end": "2024-09-29",
              "val": 23841000,
              "accn": "0000851205-24-000079",
              "fy": 2024,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2024-10-31"
            },
            {
              "start": "2024-07-01",
              "end": "2024-09-29",
              "val": 3962000,
              "accn": "0000851205-24-000079",
              "fy": 2024,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2024-10-31",
              "frame": "CY2024Q3"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 67085000,
              "accn": "0000851205-25-000012",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-13",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
              "end": "2025-03-30",
              "val": 103413000,
              "accn": "0000851205-25-000031",
              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2025-05-01",
              "frame": "CY2025Q1"
            }
          ]
        }
      },
      "StockRepurchaseProgramAuthorizedAmount": {
        "label": "Stock Repurchase Program, Authorized Amount (Deprecated 2014-01-31)",
        "description": "Amount of a stock repurchase plan authorized by an entity's Board of Directors.",
        "units": {
          "USD": [
            {
              "start": "2008-03-02",
              "end": "2008-04-01",
              "val": 50000000,
              "accn": "0001193125-13-413434",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-28"
            },
            {
              "start": "2008-04-01",
              "end": "2008-04-30",
              "val": 50000000,
              "accn": "0001193125-13-307320",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-29"
            },
            {
              "start": "2008-04-01",
              "end": "2008-04-30",
              "val": 50000000,
              "accn": "0001193125-13-182039",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29"
            },
            {
              "start": "2008-04-01",
              "end": "2008-04-30",
              "val": 50000000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11"
            },
            {
              "start": "2008-04-01",
              "end": "2008-04-30",
              "val": 50000000,
              "accn": "0001193125-12-439710",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29"
            },
            {
              "start": "2008-04-01",
              "end": "2008-04-30",
              "val": 50000000,
              "accn": "0001193125-12-322429",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-30"
            },
            {
              "start": "2008-04-01",
              "end": "2008-04-30",
              "val": 50000000,
              "accn": "0001193125-12-195955",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "start": "2008-04-01",
              "end": "2008-04-30",
              "val": 50000000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09"
            },
            {
              "start": "2008-04-01",
              "end": "2008-04-30",
              "val": 50000000,
              "accn": "0000950123-11-093948",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-01"
            },
            {
              "start": "2011-10-03",
              "end": "2011-11-01",
              "val": 80000000,
              "accn": "0001193125-13-413434",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-28"
            },
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 80000000,
              "accn": "0001193125-13-307320",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-29"
            },
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 80000000,
              "accn": "0001193125-13-182039",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29"
            },
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 80000000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11"
            },
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 80000000,
              "accn": "0001193125-12-439710",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29"
            },
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 80000000,
              "accn": "0001193125-12-322429",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-30"
            },
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 80000000,
              "accn": "0001193125-12-195955",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 80000000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09"
            },
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 80000000,
              "accn": "0000950123-11-093948",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-01"
            }
          ]
        }
      },
      "StockRepurchaseProgramAuthorizedAmount1": {
        "label": "Stock Repurchase Program, Authorized Amount",
        "description": "Amount of stock repurchase plan authorized.",
        "units": {
          "USD": [
            {
              "end": "2018-04-01",
              "val": 200000000,
              "accn": "0000851205-18-000007",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-30",
              "frame": "CY2018Q1I"
            }
          ]
        }
      },
      "StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount": {
        "label": "Stock Repurchase Program, Remaining Authorized Repurchase Amount (Deprecated 2014-01-31)",
        "description": "Amount remaining of a stock repurchase plan authorized by an entity's Board of Directors.",
        "units": {
          "USD": [
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 20000000,
              "accn": "0001193125-13-048665",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-11"
            },
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 20000000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09"
            },
            {
              "start": "2011-11-01",
              "end": "2011-11-30",
              "val": 20000000,
              "accn": "0000950123-11-093948",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-01"
            }
          ]
        }
      },
      "StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1": {
        "label": "Stock Repurchase Program, Remaining Authorized Repurchase Amount",
        "description": "Amount remaining of a stock repurchase plan authorized.",
        "units": {
          "USD": [
            {
              "end": "2019-06-30",
              "val": 129688000,
              "accn": "0000851205-19-000010",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-29",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-29",
              "val": 129688000,
              "accn": "0000851205-19-000012",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2020-03-29",
              "val": 78652000,
              "accn": "0000851205-20-000004",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-04-27",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-28",
              "val": 78652000,
              "accn": "0000851205-20-000011",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-29",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-27",
              "val": 78652000,
              "accn": "0000851205-20-000016",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-28",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2021-04-04",
              "val": 72173000,
              "accn": "0000851205-21-000010",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-05-06",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-07-04",
              "val": 57775000,
              "accn": "0000851205-21-000020",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-08-05",
              "frame": "CY2021Q2I"
            },
            {
              "end": "2021-10-03",
              "val": 30357000,
              "accn": "0000851205-21-000024",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-11-04",
              "frame": "CY2021Q3I"
            },
            {
              "end": "2024-12-31",
              "val": 265807000,
              "accn": "0000851205-25-000012",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-13",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 115020000,
              "accn": "0000851205-26-000012",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-12",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "TaxAdjustmentsSettlementsAndUnusualProvisions": {
        "label": "Tax Adjustments, Settlements, and Unusual Provisions",
        "description": "Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.",
        "units": {
          "USD": [
            {
              "start": "2021-07-05",
              "end": "2021-10-03",
              "val": 648000,
              "accn": "0000851205-21-000024",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-11-04",
              "frame": "CY2021Q3"
            }
          ]
        }
      },
      "TaxCutsAndJobsActOf2017MeasurementPeriodAdjustmentIncomeTaxExpenseBenefit": {
        "label": "Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)",
        "description": "Amount of income tax expense (benefit) for measurement period adjustment from accounting for tax effect pursuant to Tax Cuts and Jobs Act.",
        "units": {
          "USD": [
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 3240000,
              "accn": "0000851205-21-000005",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-11",
              "frame": "CY2018"
            }
          ]
        }
      },
      "TaxCutsAndJobsActOf2017TransitionTaxForAccumulatedForeignEarningsIncomeTaxExpense": {
        "label": "Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense",
        "description": "Amount of income tax expense from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act.",
        "units": {
          "USD": [
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 11028000,
              "accn": "0000851205-21-000005",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-11",
              "frame": "CY2018"
            }
          ]
        }
      },
      "TaxCutsAndJobsActOf2017TransitionTaxForAccumulatedForeignEarningsLiability": {
        "label": "Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability",
        "description": "Amount of tax liability from transition tax on accumulated earnings of controlled foreign corporation deemed repatriated pursuant to Tax Cuts and Jobs Act.",
        "units": {
          "USD": [
            {
              "end": "2018-12-31",
              "val": 90351000,
              "accn": "0000851205-21-000005",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-11",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "TradingSecurities": {
        "label": "Debt Securities, Trading, and Equity Securities, FV-NI",
        "description": "Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).",
        "units": {
          "USD": [
            {
              "end": "2013-12-31",
              "val": 1429000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2013Q4I"
            }
          ]
        }
      },
      "TradingSecuritiesFairValueDisclosure": {
        "label": "Trading Securities, Fair Value Disclosure (Deprecated 2013-01-31)",
        "description": "This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Trading Securities which consist of all investments in certain debt and equity securities that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for which an entity has elected the fair value option. Trading generally reflects active and frequent buying and selling, and trading securities are generally used with the objective of generating profits on short-term differences in price, but this category of investments may also include items which are not intended to be sold in the near term or for which the fair value option has been elected.",
        "units": {
          "USD": [
            {
              "end": "2012-07-01",
              "val": 353000,
              "accn": "0001193125-12-322429",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2I"
            }
          ]
        }
      },
      "TradingSecuritiesRealizedLoss": {
        "label": "Trading Securities, Realized Loss",
        "description": "This item represents the loss realized during the period from the sale of trading securities.",
        "units": {
          "USD": [
            {
              "start": "2012-07-02",
              "end": "2012-09-30",
              "val": 19000,
              "accn": "0001193125-12-439710",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29",
              "frame": "CY2012Q3"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 702000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2013"
            }
          ]
        }
      },
      "TradingSecuritiesUnrealizedHoldingGainLoss": {
        "label": "Trading Securities, Change in Unrealized Holding Gain (Loss)",
        "description": "Amount of unrealized holding gain (loss) recognized in the income statement for investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading.",
        "units": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-06-30",
              "val": -462000,
              "accn": "0000851205-14-000015",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-28"
            },
            {
              "start": "2013-01-01",
              "end": "2013-09-29",
              "val": 267000,
              "accn": "0000851205-14-000017",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-27"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-29",
              "val": 0,
              "accn": "0000851205-14-000015",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-28"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-28",
              "val": 0,
              "accn": "0000851205-14-000017",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-27"
            }
          ]
        }
      },
      "TradingSecuritiesUnrealizedHoldingLoss": {
        "label": "Trading Securities, Unrealized Holding Loss",
        "description": "Amount of unrealized holding loss before gain recognized in the income statement for investments in trading securities.",
        "units": {
          "USD": [
            {
              "start": "2012-04-02",
              "end": "2012-07-01",
              "val": 18000,
              "accn": "0001193125-12-322429",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-30",
              "frame": "CY2012Q2"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 5000,
              "accn": "0000851205-15-000003",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-12",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-06-30",
              "val": 462000,
              "accn": "0001193125-13-307320",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-29"
            },
            {
              "start": "2013-01-01",
              "end": "2013-09-29",
              "val": 267000,
              "accn": "0001193125-13-413434",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-28"
            }
          ]
        }
      },
      "TreasuryStockNumberOfSharesHeld": {
        "label": "Treasury Stock, Number of Shares Held (Deprecated 2016-01-31)",
        "description": "Number of shares held for each class of treasury stock.",
        "units": {
          "shares": [
            {
              "end": "2011-12-31",
              "val": 1375875,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "TreasuryStockValue": {
        "label": "Treasury Stock, Value",
        "description": "The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 30000000,
              "accn": "0001193125-12-049244",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-09",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "UnbilledContractsReceivable": {
        "label": "Unbilled Contracts Receivable",
        "description": "Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.",
        "units": {
          "USD": [
            {
              "end": "2013-12-31",
              "val": 1793000,
              "accn": "0000851205-14-000017",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-27",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-09-28",
              "val": 13292000,
              "accn": "0000851205-14-000017",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-27",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2014-12-31",
              "val": 0,
              "accn": "0000851205-15-000020",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-08-03",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-07-05",
              "val": 51648000,
              "accn": "0000851205-15-000020",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-08-03",
              "frame": "CY2015Q2I"
            }
          ]
        }
      },
      "UnbilledReceivablesCurrent": {
        "label": "Unbilled Receivables, Current",
        "description": "Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.",
        "units": {
          "USD": [
            {
              "end": "2015-12-31",
              "val": 24000,
              "accn": "0000851205-16-000035",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-08-01"
            },
            {
              "end": "2015-12-31",
              "val": 24000,
              "accn": "0000851205-16-000038",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-31"
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              "filed": "2026-02-12",
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      "ValuationAllowancesAndReservesChargedToOtherAccounts": {
        "label": "SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account",
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      "EffectiveIncomeTaxRateReconciliationTaxCreditsResearch": {
        "label": "Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent",
        "description": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.",
        "units": {
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        }
      },
      "IncomeTaxHolidayAggregateDollarAmount": {
        "label": "Income Tax Holiday, Aggregate Dollar Amount",
        "description": "The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction.",
        "units": {
          "USD": [
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              "form": "10-K",
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            {
              "start": "2025-01-01",
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              "accn": "0000851205-26-000012",
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          ]
        }
      },
      "IncomeTaxHolidayIncomeTaxBenefitsPerShare": {
        "label": "Income Tax Holiday, Income Tax Benefits Per Share",
        "description": "Per share amount effect of the income tax benefit resulting from the income tax holidays granted by taxing jurisdictions.",
        "units": {
          "USD/shares": [
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      "IncomeTaxPaidFederalAfterRefundReceived": {
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        "description": null,
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      "IncomeTaxPaidStateAndLocalAfterRefundReceived": {
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      },
      "IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate": {
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        "description": "The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.",
        "units": {
          "USD": [
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      },
      "IncomeTaxReconciliationNondeductibleExpenseOther": {
        "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount",
        "description": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other nondeductible expenses.",
        "units": {
          "USD": [
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              "start": "2025-01-01",
              "end": "2025-12-31",
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      "IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost": {
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        "description": "Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.",
        "units": {
          "USD": [
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              "start": "2025-01-01",
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              "accn": "0000851205-26-000012",
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      },
      "IncomeTaxReconciliationTaxCreditsForeign": {
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        "description": "Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign tax credit.",
        "units": {
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        "description": "Amount of lease payment to be received by lessor for operating lease in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
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        "description": "Amount of lease payment to be received by lessor for operating lease after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
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      "SubleaseIncome": {
        "label": "Sublease Income",
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        "units": {
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      "GoodwillWrittenOffRelatedToSaleOfBusinessUnit": {
        "label": "Goodwill, Written off Related to Sale of Business Unit",
        "description": "Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.",
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      "PaymentsForOtherOperatingActivities": {
        "label": "Payments for Other Operating Activities",
        "description": "Amount of cash outflow for operating activities classified as other.",
        "units": {
          "USD": [
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              "start": "2025-01-01",
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            {
              "start": "2026-01-01",
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              "accn": "0000851205-26-000040",
              "fy": 2026,
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              "form": "10-Q",
              "filed": "2026-05-07",
              "frame": "CY2026Q1"
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          ]
        }
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    },
    "ffd": {
      "NetFeeAmt": {
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        "description": "",
        "units": {
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      },
      "TtlFeeAmt": {
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      "TtlOfferingAmt": {
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      "TtlOffsetAmt": {
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}