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Income Taxes (Narrative) (Details) - USD ($)			3 Months Ended				9 Months Ended
	Mar. 27, 2020	Mar. 26, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Business interest limitation percent	50.00%	30.00%
Income tax benefit (expense)			$ (7,280,000)			$ 12,530,000	$ 48,461,000	$ 40,692,000
Uncategorized Tax Benefits			51,600,000				$ 51,600,000		$ 51,600,000
Tax impact from CARES Act			$ 0	$ (5,500,000)
2019 NOL [Member]
Income tax benefit (expense)					$ 28,400,000

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Tax Impact From CARES Act

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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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