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Income Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Current tax expense: |  |  |
Current Federal Tax Expense (Benefit) | $ (729) | $ 96 | $ (1,077)
Current State and Local Tax Expense (Benefit) | 86 | 444 | 777
Current Foreign Tax Expense (Benefit) | 6,963 | 8,375 | 8,036
Current income tax expense (benefit) | 6,320 | 8,915 | 7,736
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] |  |  |
Deferred Federal Income Tax Expense (Benefit) | (12,253) | (3,970) | 4,478
Deferred State and Local Income Tax Expense (Benefit) | (1,173) | (938) | 62
Deferred Foreign Income Tax Expense (Benefit) | (808) | (1,402) | (2,477)
Deferred income tax expense (benefit): | (14,234) | (6,310) | 2,063
Provision (benefit) for income taxes | $ (7,914) | $ 2,605 | 9,799
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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