Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share Reconciliation [Abstract]
Earnings from continuing operations	$ (105,162)	$ (26,632)	$ 28,571	$ (3,998)
fair value adjustment to warrants, net of tax	0	0	(19,312)	0
Undistributed Earnings (Loss) from Continuing Operations Available to Common Shareholders, Diluted	$ (105,162)	$ (26,632)	$ 9,259	$ (3,998)
Weighted-average shares outstanding for basic earnings per share (in shares)	59,130	58,909	59,085	58,874
Common equivalent shares:
Effect of stock-based compensation awards (in shares)	0	0	9,019	0
Weighted-average shares outstanding assuming dilution (in shares)	59,130	58,909	68,104	58,874
Basic earnings per share from continuing operations (in dollars per share)	$ (1.78)	$ (0.45)	$ 0.48	$ (0.07)
Diluted earnings per share from continuing operations (in dollars per share)	$ (1.78)	$ (0.45)	$ 0.14	$ (0.07)
Equivalent shares not included in weighted average shares outstanding because they would be anti-dilutive	9,300	10,900	100	10,800
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	39,500	39,500