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Income Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Current tax expense: |  |  |
Current Federal Tax Expense (Benefit) | $ 96 | $ (1,077) | $ 1,744
Current State and Local Tax Expense (Benefit) | 444 | 777 | 2,101
Current Foreign Tax Expense (Benefit) | 8,375 | 8,036 | 9,421
Current income tax expense (benefit) | 8,915 | 7,736 | 13,266
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] |  |  |
Deferred Federal Income Tax Expense (Benefit) | (3,970) | 4,478 | (44,456)
Deferred State and Local Income Tax Expense (Benefit) | (938) | 62 | (1,036)
Deferred Foreign Income Tax Expense (Benefit) | (1,402) | (2,477) | 5,471
Deferred income tax expense (benefit): | (6,310) | 2,063 | (40,021)
Provision (benefit) for income taxes | $ 2,605 | 9,799 | (26,755)
Tax Cuts and Jobs Act, Incomplete Accounting, Provisional Income Tax Expense (Benefit) |  |  | $ (31,900)
Tax Cuts and Jobs Act, Measurement Period Adjustment, Deferred Tax Revaluation, Income Tax Expense (Benefit) |  | 1,300 |
Tax Cuts and Jobs Act, Measurement Period Adjustment, Foreign Items, Income Tax Expense (Benefit) |  | (400) |
Tax Cuts and Jobs Act, Income Tax Expense (Benefit) |  | $ (31,000) |

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- Definition Amount of income tax expense (benefit) for measurement period adjustment from accounting for tax effect pursuant to Tax Cuts and Jobs Act related to foreign items. + References No definition available. + Details
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