| Income Taxes (Components of Provision (Benefit) for Income Taxes) (Details) - USD ($) $ in Thousands | 12 Months Ended | ||
|---|---|---|---|
| Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | |
| schedule of income tax expense [Line Items] | |||
| Settlements | $ 0 | $ 1,464 | $ 319 | 
| Current, federal | 18,435 | 41,148 | 59,213 | 
| Current, state and local | 4,929 | 7,458 | 9,959 | 
| Current, non-U.S. | 26,897 | 30,930 | 28,700 | 
| Current income tax expense | 50,261 | 79,536 | 97,872 | 
| Deferred, federal | (14,728) | (7,887) | (10,961) | 
| Deferred, state and local | (5,097) | (999) | (1,910) | 
| Deferred, non-U.S. | 1,074 | 4,290 | 768 | 
| Deferred income tax expense | (18,751) | (4,596) | (12,103) | 
| Income Tax Expense (Benefit), Total | $ 31,510 | $ 74,940 | $ 85,769 | 
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- Definition [Line Items] for schedule of income tax expense [Table] No definition available. 
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- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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