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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2017	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Effective tax rate	16.10%	(9.40%)		15.10%	2.60%
Unrecognized tax benefits that would have a favorable impact on effective tax rate	$ 2,000			$ 2,000
Provision for income taxes	$ 37,767	$ (17,264)		$ 70,185	$ 11,379
U.S. statutory rate	21.00%	21.00%	35.00%	21.00%	21.00%

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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