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Income Taxes Income Taxes narrative (TCJA details) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |
Tax Cuts and Jobs Act Of 2017, provisional tax expense | $ 5,064,000 | $ 95,610,000
Tax Cuts and Jobs Act of 2017, provisional decrease to deferred tax assets | (1,450,000) | 15,017,000
Tax Cuts and Jobs Act Of 2017, provisional transition tax obligation | 5,424,000 | 49,947,000
Tax Cuts and Jobs Act Of 2017, provisional liability for withholding tax | 1,648,000 | 23,690,000
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Foreign Tax Credit, Provisional Income Tax Expense | $ (557,000) | $ 6,956,000

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