Discontinued Operations (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended
	Feb. 02, 2021	Mar. 31, 2021	Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reduction in value of assets held for sale	$ (2,654)		$ 46,358
Income tax expense (benefit)	$ 59,901	$ (7,852)	(10,254)
Segment, Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reduction in value of assets held for sale			46,400
Income tax expense (benefit)			$ 12,500