Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share Reconciliation [Abstract]
Earnings from continuing operations	$ (5,745)	$ 105,085	$ 22,826	$ 101,087
fair value adjustment to warrants, net of tax	0	(91,849)	0	(71,319)
Undistributed Earnings (Loss) from Continuing Operations Available to Common Shareholders, Diluted	$ (5,745)	$ 13,236	$ 22,826	$ 29,768
Weighted-average shares outstanding for basic earnings per share (in shares)	59,146	58,919	59,106	58,889
Common equivalent shares:
Effect of stock-based compensation awards (in shares)	0	9,799	757	10,493
Weighted-average shares outstanding assuming dilution (in shares)	59,146	68,718	59,863	69,382
Basic earnings per share from continuing operations (in dollars per share)	$ (0.10)	$ 1.78	$ 0.39	$ 1.72
Diluted earnings per share from continuing operations (in dollars per share)	$ (0.10)	$ 0.19	$ 0.38	$ 0.43
Equivalent shares not included in weighted average shares outstanding because they would be anti-dilutive	13,300		9,700