Income Taxes (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
Dec. 22, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Valuation allowance		$ 1,400	$ 0
Effect of change in U.S. tax law	$ 58,558
Effect of change in U.S. tax law		$ 0	$ 2,777	$ 58,558

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

+ References

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Amount of reasonable estimate for income tax expense for which accounting for tax effect for remeasurement of deferred tax asset from change in tax rate is incomplete pursuant to Tax Cuts and Jobs Act.

+ References

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