Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Earnings Per Share Reconciliation [Abstract]
Earnings from continuing operations	$ 133,733	$ 22,634
fair value adjustment to warrants, net of tax	(76,361)	(7,653)
Undistributed Earnings (Loss) from Continuing Operations Available to Common Shareholders, Diluted	$ 57,372	$ 14,981
Weighted-average shares outstanding for basic earnings per share (in shares)	59,040	58,838
Common equivalent shares:
Effect of stock-based compensation awards (in shares)	8,907	1,599
Weighted-average shares outstanding assuming dilution (in shares)	67,947	60,437
Basic earnings per share from continuing operations (in dollars per share)	$ 2.27	$ 0.38
Diluted earnings per share from continuing operations (in dollars per share)	$ 0.84	$ 0.25
Equivalent shares not included in weighted average shares outstanding because they would be anti-dilutive		9,200
Amazon Warrant AB [Member]
Earnings Per Share Reconciliation [Abstract]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	39,500		39,500