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Income Taxes - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2020
Income Tax Contingency [Line Items] |  |  |  |  |
Discrete benefit from net operating loss carryback from CARES Act |  |  |  |  | $ 125,000
Deferred payroll tax liability from CARES Act |  |  | $ 41,000 |  |
Deferred tax liabilities which have not been recorded with respect to unremitted earnings that are considered indefinitely reinvested |  |  | 28,000 |  |
U.S. foreign tax credits | $ 226,845 |  | 414,348 | $ 226,845 |
Charge to tax expense to record valuation allowance | (185,000) | $ (546,000) |  |  |
Unrecognized tax benefits that, if recognized, would have favorably impacted effective tax rates | 22,000 |  | 30,000 | 22,000 |
Accrued interest and penalties | $ 10,000 |  | 11,000 | 10,000 |
Domestic |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Net operating loss carryforwards related to various jurisdictions |  |  | 159,000 |  |
Charge to tax expense to record valuation allowance |  |  | 142,000 | 602,000 |
Foreign |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Net operating loss carryforwards related to various jurisdictions |  |  | 1,200,000 |  |
Net operating loss carryforwards, with expiration |  |  | 296,000 |  |
Net operating loss carryforwards, able to be carried forward indefinitely |  |  | 800,000 |  |
State and Local Jurisdiction |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Net operating loss carryforwards related to various jurisdictions |  |  | 908,000 |  |
Net operating loss carryforwards, with expiration |  |  | 117,000 |  |
Netherlands and Belgium |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Charge to tax expense to record valuation allowance |  |  |  | $ 129,000 |
Netherlands and Belgium | Foreign |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Charge to tax expense to record valuation allowance |  |  | 28,000 |  |
United Kingdom | Foreign |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Net operating loss carryforwards related to various jurisdictions |  |  | 599,000 |  |
Netherlands | Foreign |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |
Net operating loss carryforwards related to various jurisdictions |  |  | $ 345,000 |  |

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