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        "label": "Asset Retirement Obligation, Accretion Expense",
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            {
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        }
      },
      "AssetRetirementObligationCashPaidToSettle": {
        "label": "Asset Retirement Obligation, Cash Paid to Settle",
        "description": "Amount of cash paid during the period to settle an asset retirement obligation. Amounts paid to settle an asset retirement obligation are generally included in the operating section of the Statement of Cash Flows.",
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          ]
        }
      },
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        "label": "Asset Retirement Obligation, Current",
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        "label": "Asset Retirement Obligation, Liabilities Incurred",
        "description": "Amount of asset retirement obligations incurred during the period.",
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              "val": 0,
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              "filed": "2017-02-27",
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      },
      "AssetRetirementObligationLiabilitiesSettled": {
        "label": "Asset Retirement Obligation, Liabilities Settled",
        "description": "Amount of asset retirement obligations settled, or otherwise disposed of, during the period. This may include asset retirement obligations transferred to third parties associated with the sale of a long-lived asset.",
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        "label": "Asset Retirement Obligation, Period Increase (Decrease)",
        "description": "Amount of increase (decrease) in asset retirement obligations.",
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              "filed": "2014-02-26",
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            {
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            {
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      "AssetRetirementObligationRevisionOfEstimate": {
        "label": "Asset Retirement Obligation, Revision of Estimate",
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      "Assets": {
        "label": "Assets",
        "description": "Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.",
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            {
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              "end": "2011-09-30",
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              "filed": "2011-10-31",
              "frame": "CY2011Q3I"
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            {
              "end": "2011-12-31",
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              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
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            {
              "end": "2011-12-31",
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            {
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              "accn": "0001193125-12-196591",
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            },
            {
              "end": "2012-03-31",
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              "fy": 2012,
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            {
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              "end": "2012-09-30",
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            {
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
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          ]
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      },
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        "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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              "accn": "0001193125-12-072924",
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            {
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            {
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            {
              "end": "2011-09-30",
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
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            {
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            {
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            {
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              "filed": "2018-02-26",
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            {
              "end": "2017-03-31",
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      "AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost": {
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              "filed": "2023-02-27"
            },
            {
              "end": "2022-12-31",
              "val": 333835000,
              "accn": "0001048477-23-000020",
              "fy": 2023,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2023-04-28"
            },
            {
              "end": "2022-12-31",
              "val": 333835000,
              "accn": "0001048477-23-000029",
              "fy": 2023,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2023-08-02"
            },
            {
              "end": "2022-12-31",
              "val": 333835000,
              "accn": "0001048477-23-000044",
              "fy": 2023,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2023-11-02"
            },
            {
              "end": "2022-12-31",
              "val": 333835000,
              "accn": "0001048477-24-000016",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-26",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-03-31",
              "val": 340635000,
              "accn": "0001048477-23-000020",
              "fy": 2023,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2023-04-28",
              "frame": "CY2023Q1I"
            },
            {
              "end": "2023-06-30",
              "val": 385777000,
              "accn": "0001048477-23-000029",
              "fy": 2023,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2023-08-02",
              "frame": "CY2023Q2I"
            },
            {
              "end": "2023-09-30",
              "val": 548002000,
              "accn": "0001048477-23-000044",
              "fy": 2023,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2023-11-02",
              "frame": "CY2023Q3I"
            },
            {
              "end": "2023-12-31",
              "val": 611135000,
              "accn": "0001048477-24-000016",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-26"
            },
            {
              "end": "2023-12-31",
              "val": 611135000,
              "accn": "0001048477-24-000070",
              "fy": 2024,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2024-04-26"
            },
            {
              "end": "2023-12-31",
              "val": 611135000,
              "accn": "0001048477-24-000126",
              "fy": 2024,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2024-08-05"
            },
            {
              "end": "2023-12-31",
              "val": 611135000,
              "accn": "0001048477-24-000152",
              "fy": 2024,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2024-10-31"
            },
            {
              "end": "2023-12-31",
              "val": 611135000,
              "accn": "0001048477-25-000007",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-03-31",
              "val": 620551000,
              "accn": "0001048477-24-000070",
              "fy": 2024,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2024-04-26",
              "frame": "CY2024Q1I"
            },
            {
              "end": "2024-06-30",
              "val": 557083000,
              "accn": "0001048477-24-000126",
              "fy": 2024,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2024-08-05",
              "frame": "CY2024Q2I"
            },
            {
              "end": "2024-09-30",
              "val": 561985000,
              "accn": "0001048477-24-000152",
              "fy": 2024,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2024-10-31",
              "frame": "CY2024Q3I"
            },
            {
              "end": "2024-12-31",
              "val": 521238000,
              "accn": "0001048477-25-000007",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24"
            },
            {
              "end": "2024-12-31",
              "val": 521238000,
              "accn": "0001048477-25-000051",
              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2025-05-02"
            },
            {
              "end": "2024-12-31",
              "val": 521238000,
              "accn": "0001048477-25-000090",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-08-05"
            },
            {
              "end": "2024-12-31",
              "val": 521238000,
              "accn": "0001048477-25-000107",
              "fy": 2025,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2025-10-28"
            },
            {
              "end": "2024-12-31",
              "val": 521238000,
              "accn": "0001048477-26-000004",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-03-31",
              "val": 506724000,
              "accn": "0001048477-25-000051",
              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2025-05-02",
              "frame": "CY2025Q1I"
            },
            {
              "end": "2025-06-30",
              "val": 508592000,
              "accn": "0001048477-25-000090",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-08-05",
              "frame": "CY2025Q2I"
            },
            {
              "end": "2025-09-30",
              "val": 512937000,
              "accn": "0001048477-25-000107",
              "fy": 2025,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2025-10-28",
              "frame": "CY2025Q3I"
            },
            {
              "end": "2025-12-31",
              "val": 492242000,
              "accn": "0001048477-26-000004",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26"
            },
            {
              "end": "2025-12-31",
              "val": 492242000,
              "accn": "0001048477-26-000008",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-05-05",
              "frame": "CY2025Q4I"
            },
            {
              "end": "2026-03-31",
              "val": 0,
              "accn": "0001048477-26-000008",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-05-05",
              "frame": "CY2026Q1I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesFairValueDisclosure": {
        "label": "Available-for-sale 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 Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 314204000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 314204000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31"
            },
            {
              "end": "2010-12-31",
              "val": 314204000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01"
            },
            {
              "end": "2011-06-30",
              "val": 299170000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 298760000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 243205000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 243205000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29"
            },
            {
              "end": "2011-12-31",
              "val": 243205000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2011-12-31",
              "val": 243205000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "end": "2011-12-31",
              "val": 243205000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22"
            },
            {
              "end": "2012-03-31",
              "val": 205144000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 346799000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 351866000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 386204000,
              "accn": "0001193125-13-181733",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 386204000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2013-03-31",
              "val": 371321000,
              "accn": "0001193125-13-181733",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesGrossUnrealizedGainLoss": {
        "label": "Available-for-sale Securities, Gross Unrealized Gain (Loss) (Deprecated 2013-01-31)",
        "description": "The net amount of gross unrealized gains (losses) for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 662000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 70000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 70000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29"
            },
            {
              "end": "2011-12-31",
              "val": 70000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2011-12-31",
              "val": 70000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "end": "2011-12-31",
              "val": 70000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22"
            },
            {
              "end": "2012-03-31",
              "val": 337000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": -23000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 448000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 194000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesGrossUnrealizedLosses1": {
        "label": "Available-for-sale Securities, Gross Unrealized Losses (Deprecated 2013-01-31)",
        "description": "This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2012-12-31",
              "val": 279,
              "accn": "0001193125-13-181733",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-03-31",
              "val": 175,
              "accn": "0001193125-13-181733",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesNoncurrent": {
        "label": "Available-for-sale Securities, Noncurrent",
        "description": "Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.",
        "units": {
          "USD": [
            {
              "end": "2017-12-31",
              "val": 385785000,
              "accn": "0001564590-18-009416",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-27"
            },
            {
              "end": "2017-12-31",
              "val": 385785000,
              "accn": "0001564590-18-019022",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-03",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-03-31",
              "val": 313599000,
              "accn": "0001564590-18-009416",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-27",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2018-06-30",
              "val": 279988000,
              "accn": "0001564590-18-019022",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-03",
              "frame": "CY2018Q2I"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses1": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses (Deprecated 2012-01-31)",
        "description": "This item represents the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for those securities which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 102000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 102000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31"
            },
            {
              "end": "2010-12-31",
              "val": 102000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01"
            },
            {
              "end": "2011-06-30",
              "val": 17000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 197000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 35000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 35000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22"
            },
            {
              "end": "2012-03-31",
              "val": 39000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses2": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses (Deprecated 2013-01-31)",
        "description": "Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for securities which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 35000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 35000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29"
            },
            {
              "end": "2011-12-31",
              "val": 35000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2012-06-30",
              "val": 191000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 91000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 167000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses1": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses (Deprecated 2012-01-31)",
        "description": "This item represents the excess of amortized cost basis over fair value of securities in a loss position and which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 131000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 131000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31"
            },
            {
              "end": "2010-12-31",
              "val": 131000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01"
            },
            {
              "end": "2011-06-30",
              "val": 29000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 314000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 231000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 231000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22"
            },
            {
              "end": "2012-03-31",
              "val": 55000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses2": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses (Deprecated 2013-01-31)",
        "description": "Amount of the excess of amortized cost basis over fair value of securities in a loss position and categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 231000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 231000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29"
            },
            {
              "end": "2011-12-31",
              "val": 231000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2012-06-30",
              "val": 300000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 110000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 279000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses1": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses (Deprecated 2012-01-31)",
        "description": "This item represents the excess of amortized cost basis over fair value of securities that have been in a loss position for less than twelve months for those securities which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 29000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 29000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31"
            },
            {
              "end": "2010-12-31",
              "val": 29000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01"
            },
            {
              "end": "2011-06-30",
              "val": 12000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 117000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 196000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 196000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22"
            },
            {
              "end": "2012-03-31",
              "val": 16000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses2": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses (Deprecated 2013-01-31)",
        "description": "Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for less than twelve months for securities categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 196000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 196000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29"
            },
            {
              "end": "2011-12-31",
              "val": 196000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2012-06-30",
              "val": 109000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 19000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 112000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesGrossUnrealizedGain": {
        "label": "Available-for-sale Securities, Gross Unrealized Gains (Deprecated 2013-01-31)",
        "description": "This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2012-12-31",
              "val": 473,
              "accn": "0001193125-13-181733",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-03-31",
              "val": 703,
              "accn": "0001193125-13-181733",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "BuildingsAndImprovementsGross": {
        "label": "Buildings and Improvements, Gross",
        "description": "Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 138025000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 141484000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 141484000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29"
            },
            {
              "end": "2011-12-31",
              "val": 141484000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2011-12-31",
              "val": 141484000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "end": "2011-12-31",
              "val": 141484000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22"
            },
            {
              "end": "2012-03-31",
              "val": 142711000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 143018000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 143773000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 144700000,
              "accn": "0001193125-14-070025",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 144700000,
              "accn": "0001193125-13-413125",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-28"
            },
            {
              "end": "2012-12-31",
              "val": 144700000,
              "accn": "0001193125-13-306978",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-29"
            },
            {
              "end": "2012-12-31",
              "val": 144700000,
              "accn": "0001193125-13-181733",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29"
            },
            {
              "end": "2012-12-31",
              "val": 144700000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2013-03-31",
              "val": 146548000,
              "accn": "0001193125-13-181733",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 146999000,
              "accn": "0001193125-13-306978",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-29",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 154479000,
              "accn": "0001193125-13-413125",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-28",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-31",
              "val": 159125000,
              "accn": "0001193125-14-070025",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            }
          ]
        }
      },
      "BusinessAcquisitionContingentConsiderationAtFairValue": {
        "label": "Business Acquisition, Contingent Consideration, at Fair Value (Deprecated 2013-01-31)",
        "description": "Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 43718000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 43718000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31"
            },
            {
              "end": "2010-12-31",
              "val": 43718000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01"
            },
            {
              "end": "2011-06-30",
              "val": 38786000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 38020000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 38614000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 38614000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2011-12-31",
              "val": 38614000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "end": "2011-12-31",
              "val": 38614000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22"
            },
            {
              "end": "2012-03-31",
              "val": 33433000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 34673000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 35290000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 41400000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            }
          ]
        }
      },
      "BusinessAcquisitionContingentConsiderationAtFairValueCurrent": {
        "label": "Business Acquisition, Contingent Consideration, at Fair Value, Current (Deprecated 2013-01-31)",
        "description": "Current portion of the fair value as of the acquisition date of potential payments under the contingent consideration arrangement, including cash and shares as applicable.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 8794000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 8794000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31"
            },
            {
              "end": "2010-12-31",
              "val": 8794000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01"
            },
            {
              "end": "2011-06-30",
              "val": 3000000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 5479000,
              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-31",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 5555000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 5555000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29"
            },
            {
              "end": "2011-12-31",
              "val": 5555000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2011-12-31",
              "val": 5555000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "end": "2011-12-31",
              "val": 5555000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22"
            },
            {
              "end": "2012-03-31",
              "val": 5625000,
              "accn": "0001193125-12-196591",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 5892000,
              "accn": "0001193125-12-331653",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 5921000,
              "accn": "0001193125-12-439875",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-29",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 10764000,
              "accn": "0001193125-13-181733",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 10764000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2013-03-31",
              "val": 20766000,
              "accn": "0001193125-13-181733",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2013Q1I"
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          ]
        }
      },
      "BusinessAcquisitionContingentConsiderationAtFairValueNoncurrent": {
        "label": "Business Acquisition, Contingent Consideration, at Fair Value, Noncurrent (Deprecated 2013-01-31)",
        "description": "Noncurrent portion of the fair value as of the acquisition date of potential payments under the contingent consideration arrangement, including cash and shares as applicable.",
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              "accn": "0001193125-12-072924",
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            {
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              "fy": 2011,
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            },
            {
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            },
            {
              "end": "2011-06-30",
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              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01",
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            {
              "end": "2011-09-30",
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              "accn": "0001193125-11-288430",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
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              "frame": "CY2011Q3I"
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            {
              "end": "2011-12-31",
              "val": 33059000,
              "accn": "0001193125-12-439875",
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              "fp": "Q3",
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              "filed": "2012-10-29",
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            },
            {
              "end": "2011-12-31",
              "val": 33059000,
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              "fy": 2012,
              "fp": "Q2",
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            },
            {
              "end": "2011-12-31",
              "val": 33059000,
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              "fp": "Q1",
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            },
            {
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            {
              "end": "2012-03-31",
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              "fp": "Q1",
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              "filed": "2012-04-30",
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            {
              "end": "2012-06-30",
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              "fy": 2012,
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              "form": "10-Q",
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              "frame": "CY2012Q2I"
            },
            {
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          ]
        }
      },
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              "filed": "2011-08-01"
            },
            {
              "start": "2011-04-01",
              "end": "2011-06-30",
              "val": 4100000,
              "accn": "0001193125-11-204357",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-01",
              "frame": "CY2011Q2"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 5700000,
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            },
            {
              "start": "2011-07-01",
              "end": "2011-09-30",
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              "form": "10-Q",
              "filed": "2011-10-31",
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            {
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              "accn": "0001193125-12-072924",
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              "form": "10-K",
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            {
              "start": "2012-01-01",
              "end": "2012-03-31",
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            {
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              "end": "2012-06-30",
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            },
            {
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              "end": "2012-06-30",
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              "accn": "0001193125-12-331653",
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            {
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      "BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1": {
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              "fp": "Q2",
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            {
              "start": "2012-01-01",
              "end": "2012-09-30",
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            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 8788000,
              "accn": "0001193125-14-070025",
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              "filed": "2014-02-26"
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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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            {
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            },
            {
              "start": "2015-01-01",
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            {
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            },
            {
              "start": "2015-01-01",
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            {
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            {
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            {
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            {
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            {
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            {
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            {
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            {
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            {
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            {
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            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 7400000,
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              "fy": 2012,
              "fp": "FY",
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            {
              "start": "2011-01-01",
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            {
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            {
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      },
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        "label": "Debt Instrument, Convertible, Number of Equity Instruments",
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            {
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              "val": 67500000,
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              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-02"
            },
            {
              "start": "2014-07-01",
              "end": "2014-09-30",
              "val": 67500000,
              "accn": "0001193125-14-384895",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-28"
            },
            {
              "start": "2014-07-01",
              "end": "2014-09-30",
              "val": 67500000,
              "accn": "0001564590-15-009051",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-02",
              "frame": "CY2014Q3"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 67500000,
              "accn": "0001564590-15-001140",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-03-02"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 67500000,
              "accn": "0001564590-16-013653",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "start": "2014-01-01",
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              "val": 67500000,
              "accn": "0001564590-17-002483",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 369498000,
              "accn": "0001564590-16-013653",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "start": "2015-01-01",
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              "val": 369498000,
              "accn": "0001564590-17-002483",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2015-01-01",
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              "val": 369498000,
              "accn": "0001564590-18-003114",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-26",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 0,
              "accn": "0001564590-17-002483",
              "fy": 2016,
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              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2016-01-01",
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              "val": 0,
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              "fy": 2017,
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              "form": "10-K",
              "filed": "2018-02-26"
            },
            {
              "start": "2016-01-01",
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              "val": 0,
              "accn": "0001564590-19-005033",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 0,
              "accn": "0001564590-18-019022",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-03"
            },
            {
              "start": "2017-04-01",
              "end": "2017-06-30",
              "val": 0,
              "accn": "0001564590-18-019022",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-03",
              "frame": "CY2017Q2"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 0,
              "accn": "0001564590-18-025196",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-26"
            },
            {
              "start": "2017-07-01",
              "end": "2017-09-30",
              "val": 0,
              "accn": "0001564590-18-025196",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-26",
              "frame": "CY2017Q3"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 125000000,
              "accn": "0001564590-18-003114",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-26"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 125000000,
              "accn": "0001564590-19-005033",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 125000000,
              "accn": "0001048477-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": 20000000,
              "accn": "0001564590-18-019022",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-03"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": 20000000,
              "accn": "0001048477-19-000007",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-02"
            },
            {
              "start": "2018-04-01",
              "end": "2018-06-30",
              "val": 20000000,
              "accn": "0001564590-18-019022",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-03"
            },
            {
              "start": "2018-04-01",
              "end": "2018-06-30",
              "val": 20000000,
              "accn": "0001048477-19-000007",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-02",
              "frame": "CY2018Q2"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 20000000,
              "accn": "0001564590-18-025196",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-26"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 20000000,
              "accn": "0001048477-19-000015",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-29"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 20000000,
              "accn": "0001048477-19-000017",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q/A",
              "filed": "2019-11-04"
            },
            {
              "start": "2018-07-01",
              "end": "2018-09-30",
              "val": 0,
              "accn": "0001564590-18-025196",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-26"
            },
            {
              "start": "2018-07-01",
              "end": "2018-09-30",
              "val": 0,
              "accn": "0001048477-19-000015",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-29"
            },
            {
              "start": "2018-07-01",
              "end": "2018-09-30",
              "val": 0,
              "accn": "0001048477-19-000017",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q/A",
              "filed": "2019-11-04",
              "frame": "CY2018Q3"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 50000000,
              "accn": "0001564590-19-005033",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 50000000,
              "accn": "0001048477-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-06-30",
              "val": 15000000,
              "accn": "0001048477-19-000007",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-02"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 15000000,
              "accn": "0001048477-19-000007",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-02"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 15000000,
              "accn": "0001048477-19-000015",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-29"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 15000000,
              "accn": "0001048477-19-000017",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q/A",
              "filed": "2019-11-04"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 15000000,
              "accn": "0001048477-20-000023",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-08-05"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 15000000,
              "accn": "0001048477-20-000029",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-06",
              "frame": "CY2019Q2"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 15000000,
              "accn": "0001048477-19-000015",
              "fy": 2019,
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              "filed": "2019-10-29"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 15000000,
              "accn": "0001048477-19-000017",
              "fy": 2019,
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              "filed": "2019-11-04"
            },
            {
              "start": "2019-07-01",
              "end": "2019-09-30",
              "val": 0,
              "accn": "0001048477-19-000015",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-10-29"
            },
            {
              "start": "2019-07-01",
              "end": "2019-09-30",
              "val": 0,
              "accn": "0001048477-19-000017",
              "fy": 2019,
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              "filed": "2019-11-04",
              "frame": "CY2019Q3"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 25000000,
              "accn": "0001048477-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2019"
            }
          ]
        }
      },
      "GainLossOnSaleOfEquityInvestments": {
        "label": "Gain (Loss) on Sale of Equity Investments",
        "description": "The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence.",
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              "filed": "2017-02-27",
              "frame": "CY2014"
            },
            {
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              "val": 3022000,
              "accn": "0001564590-15-006130",
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            },
            {
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            },
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              "filed": "2017-02-27"
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            },
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              "val": 0,
              "accn": "0001564590-17-008822",
              "fy": 2017,
              "fp": "Q1",
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              "filed": "2017-05-04",
              "frame": "CY2016Q1"
            },
            {
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            },
            {
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              "end": "2016-09-30",
              "val": -2020000,
              "accn": "0001564590-16-027187",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-11-03"
            },
            {
              "start": "2016-01-01",
              "end": "2016-09-30",
              "val": -2020000,
              "accn": "0001564590-17-020527",
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              "filed": "2017-10-31"
            },
            {
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              "end": "2016-12-31",
              "val": -108000,
              "accn": "0001564590-17-002483",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
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              "end": "2016-12-31",
              "val": -108000,
              "accn": "0001564590-18-003114",
              "fy": 2017,
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              "filed": "2018-02-26",
              "frame": "CY2016"
            },
            {
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              "end": "2017-03-31",
              "val": 3252000,
              "accn": "0001564590-17-008822",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-04"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": 3252000,
              "accn": "0001564590-18-009416",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-27",
              "frame": "CY2017Q1"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 3252000,
              "accn": "0001564590-17-014975",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-08-02"
            },
            {
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              "end": "2017-06-30",
              "val": 3252000,
              "accn": "0001564590-18-019022",
              "fy": 2018,
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              "filed": "2018-08-03"
            },
            {
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              "val": 3252000,
              "accn": "0001564590-17-020527",
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              "filed": "2017-10-31"
            },
            {
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              "end": "2017-09-30",
              "val": 3252000,
              "accn": "0001564590-18-025196",
              "fy": 2018,
              "fp": "Q3",
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              "filed": "2018-10-26"
            },
            {
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              "end": "2017-12-31",
              "val": 3252000,
              "accn": "0001564590-18-003114",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-26",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-03-31",
              "val": 0,
              "accn": "0001564590-18-009416",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-27",
              "frame": "CY2018Q1"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": 0,
              "accn": "0001564590-18-019022",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-03"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 0,
              "accn": "0001564590-18-025196",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-26"
            }
          ]
        }
      },
      "GainLossOnSaleOfInvestments": {
        "label": "Gain (Loss) on Sale of Investments",
        "description": "The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.",
        "units": {
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              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 0,
              "accn": "0001193125-11-045527",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-24",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": 1585000,
              "accn": "0001193125-10-177277",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-04"
            },
            {
              "start": "2009-04-01",
              "end": "2009-06-30",
              "val": 1585000,
              "accn": "0001193125-10-177277",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-04",
              "frame": "CY2009Q2"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": 1585000,
              "accn": "0001193125-10-240937",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-29"
            },
            {
              "start": "2009-07-01",
              "end": "2009-09-30",
              "val": 0,
              "accn": "0001193125-10-240937",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-29",
              "frame": "CY2009Q3"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 1585000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2009"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 1585000,
              "accn": "0001193125-11-045527",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-24"
            },
            {
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            {
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      },
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            {
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              "filed": "2025-02-24"
            },
            {
              "end": "2024-12-31",
              "val": 28680000,
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              "filed": "2026-02-26",
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            {
              "end": "2025-12-31",
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              "form": "10-K",
              "filed": "2026-02-26",
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        }
      },
      "OperatingLeasesFutureMinimumPaymentsDue": {
        "label": "Operating Leases, Future Minimum Payments Due",
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              "filed": "2012-02-22"
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              "filed": "2015-03-02",
              "frame": "CY2014Q4I"
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              "filed": "2016-02-29",
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              "filed": "2017-02-27",
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            {
              "end": "2017-12-31",
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              "form": "10-K",
              "filed": "2018-02-26",
              "frame": "CY2017Q4I"
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            {
              "end": "2018-12-31",
              "val": 84991000,
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              "filed": "2019-02-28"
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            {
              "end": "2018-12-31",
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              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
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            {
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            {
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      },
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              "filed": "2017-02-27",
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              "end": "2016-12-31",
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              "form": "10-K",
              "filed": "2017-02-27",
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              "val": 3961000,
              "accn": "0001564590-18-003114",
              "fy": 2017,
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              "form": "10-K",
              "filed": "2018-02-26",
              "frame": "CY2017Q4I"
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            {
              "end": "2018-12-31",
              "val": 9993000,
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              "filed": "2019-02-28"
            },
            {
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              "val": 9993000,
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              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 9993000,
              "accn": "0001048477-19-000007",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-08-02"
            },
            {
              "end": "2018-12-31",
              "val": 9993000,
              "accn": "0001048477-19-000015",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-29"
            },
            {
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            {
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              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2018Q4I"
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          ]
        }
      },
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        "label": "Operating Leases, Future Minimum Payments, Due in Four Years",
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              "accn": "0001193125-12-072924",
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              "form": "10-K",
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              "frame": "CY2011Q4I"
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            {
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              "val": 6496000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 8343000,
              "accn": "0001193125-14-070025",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 3207000,
              "accn": "0001564590-15-001140",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-03-02",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 2990000,
              "accn": "0001564590-16-013653",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 3391000,
              "accn": "0001564590-17-002483",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 4948000,
              "accn": "0001564590-18-003114",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 10574000,
              "accn": "0001564590-19-005033",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "end": "2018-12-31",
              "val": 10574000,
              "accn": "0001564590-19-013461",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 10574000,
              "accn": "0001048477-19-000007",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-02"
            },
            {
              "end": "2018-12-31",
              "val": 10574000,
              "accn": "0001048477-19-000015",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-29"
            },
            {
              "end": "2018-12-31",
              "val": 10574000,
              "accn": "0001048477-19-000017",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q/A",
              "filed": "2019-11-04"
            },
            {
              "end": "2018-12-31",
              "val": 10574000,
              "accn": "0001048477-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "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": 3021000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 6990000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 8907000,
              "accn": "0001193125-14-070025",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 3879000,
              "accn": "0001564590-15-001140",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-03-02",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 5444000,
              "accn": "0001564590-16-013653",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 4893000,
              "accn": "0001564590-17-002483",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 5996000,
              "accn": "0001564590-18-003114",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 11198000,
              "accn": "0001564590-19-005033",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "end": "2018-12-31",
              "val": 11198000,
              "accn": "0001564590-19-013461",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 11198000,
              "accn": "0001048477-19-000007",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-02"
            },
            {
              "end": "2018-12-31",
              "val": 11198000,
              "accn": "0001048477-19-000015",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-29"
            },
            {
              "end": "2018-12-31",
              "val": 11198000,
              "accn": "0001048477-19-000017",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q/A",
              "filed": "2019-11-04"
            },
            {
              "end": "2018-12-31",
              "val": 11198000,
              "accn": "0001048477-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "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": 4700000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 6749000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 10059000,
              "accn": "0001193125-14-070025",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 4882000,
              "accn": "0001564590-15-001140",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-03-02",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 6527000,
              "accn": "0001564590-16-013653",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 7739000,
              "accn": "0001564590-17-002483",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 7671000,
              "accn": "0001564590-18-003114",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 12549000,
              "accn": "0001564590-19-005033",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "end": "2018-12-31",
              "val": 12549000,
              "accn": "0001564590-19-013461",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 12549000,
              "accn": "0001048477-19-000007",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-02"
            },
            {
              "end": "2018-12-31",
              "val": 12549000,
              "accn": "0001048477-19-000015",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-29"
            },
            {
              "end": "2018-12-31",
              "val": 12549000,
              "accn": "0001048477-19-000017",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q/A",
              "filed": "2019-11-04"
            },
            {
              "end": "2018-12-31",
              "val": 12549000,
              "accn": "0001048477-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "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": 3144000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 22226000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 20280000,
              "accn": "0001193125-14-070025",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 1677000,
              "accn": "0001564590-15-001140",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-03-02",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 9953000,
              "accn": "0001564590-16-013653",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 6637000,
              "accn": "0001564590-17-002483",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 5851000,
              "accn": "0001564590-18-003114",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 27701000,
              "accn": "0001564590-19-005033",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "end": "2018-12-31",
              "val": 27701000,
              "accn": "0001564590-19-013461",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 27701000,
              "accn": "0001048477-19-000007",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-02"
            },
            {
              "end": "2018-12-31",
              "val": 27701000,
              "accn": "0001048477-19-000015",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-29"
            },
            {
              "end": "2018-12-31",
              "val": 27701000,
              "accn": "0001048477-19-000017",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q/A",
              "filed": "2019-11-04"
            },
            {
              "end": "2018-12-31",
              "val": 27701000,
              "accn": "0001048477-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear": {
        "label": "Operating Leases, Future Minimum Payments, Remainder of Fiscal Year",
        "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 remainder of the 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": "2018-12-31",
              "val": 12976000,
              "accn": "0001048477-19-000007",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-02"
            },
            {
              "end": "2018-12-31",
              "val": 12976000,
              "accn": "0001048477-19-000015",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-29"
            },
            {
              "end": "2018-12-31",
              "val": 12976000,
              "accn": "0001048477-19-000017",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q/A",
              "filed": "2019-11-04",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesRentExpenseContingentRentals": {
        "label": "Operating Leases, Rent Expense, Contingent Rentals",
        "description": "The increases or decreases in lease payments that result from changes occurring after the inception of the lease in the factors (other than the passage of time) on which lease payments are based, except that any escalation of minimum lease payments relating to increases in construction or acquisition cost of the leased property or for increases in some measure of cost or value during the construction or preconstruction period, are excluded from contingent rentals. Contingent rentals also may include amounts for which the triggering events have not yet occurred or the specified targets for which have not yet been achieved (such as sales based percentage rent), but which events are considered probable of occurring or which specified targets are considered probable of being achieved.",
        "units": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 35900000,
              "accn": "0001193125-14-070025",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013"
            }
          ]
        }
      },
      "OperatingLeasesRentExpenseNet": {
        "label": "Operating Leases, Rent Expense, Net",
        "description": "Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.",
        "units": {
          "USD": [
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 4300000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 5100000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 5100000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 6000000,
              "accn": "0001193125-12-072924",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-22"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 6000000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 6000000,
              "accn": "0001193125-14-070025",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 10100000,
              "accn": "0001193125-13-077031",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 10100000,
              "accn": "0001193125-14-070025",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 10100000,
              "accn": "0001564590-15-001140",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-03-02",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 10400000,
              "accn": "0001193125-14-070025",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 10400000,
              "accn": "0001564590-15-001140",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-03-02"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 10400000,
              "accn": "0001564590-16-013653",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 7900000,
              "accn": "0001564590-15-001140",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-03-02"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 7900000,
              "accn": "0001564590-16-013653",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 7900000,
              "accn": "0001564590-17-002483",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 9300000,
              "accn": "0001564590-16-013653",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 9300000,
              "accn": "0001564590-17-002483",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 9300000,
              "accn": "0001564590-18-003114",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-26",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 11600000,
              "accn": "0001564590-17-002483",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
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