Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Warrant shares to be issued	1,300,000		1,300,000
Stock Repurchased During Period, Shares			380,637
Stock Repurchased During Period, Value			$ 8,500
Accelerated Share Repurchases, Final Price Paid Per Share			$ 22.42
Earnings Per Share Reconciliation [Abstract]
Earnings from continuing operations	$ (53,918)	$ 11,528	$ (44,122)	$ 19,699
Fair Value Adjustment of Warrants, net of tax	0
Fair Value Adjustment of Warrants	(67,300)	(3,664)	0	(3,405)
Net Income (Loss) Available to Common Stockholders, Diluted	$ (53,918)	$ 7,864	$ (44,122)	$ 16,294
Weighted-average shares outstanding for basic earnings per share (in shares)	59,035,000	63,267,000	59,084,000	63,452,000
Common equivalent shares:
Effect of stock-based compensation awards (in shares)	0	861,000	0	835,000
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	0	2,635,000	0	1,623,000
Weighted-average shares outstanding assuming dilution (in shares)	59,035,000	66,763,000	59,084,000	65,910,000
Basic earnings per share from continuing operations (in dollars per share)	$ (0.91)	$ 0.18	$ (0.75)	$ 0.31
Diluted earnings per share from continuing operations (in dollars per share)	$ (0.91)	$ 0.12	$ (0.75)	$ 0.25
Anti-dilutive securities excluded from computation of earnings per share (in shares)	8,474,255		7,152,442	0
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	13,600,000		13,600,000