Net Income (Loss) Per Share Net Income (Loss) Per Share - Summary of Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Income (loss) from continuing operations									$ (46,741)	$ (262,987)	$ 24,549
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest									0	0	137,688
Net income (loss)									(46,741)	(262,987)	162,237
Preferred Stock Dividends and Other Adjustments									(642)
Net Income (Loss) Available to Common Stockholders, Basic									$ (47,383)	$ (262,987)	$ 162,237
Weighted average shares outstanding (in shares)									42,030,000	31,678,000	27,433,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements									0	0	322,000
Weighted average shares outstanding (in shares)									42,030,000	31,678,000	27,755,000
Income (loss) from continuing operations per share (in usd per share)									$ (1.13)	$ (8.30)	$ 0.89
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share									0.00	0.00	5.02
Basic net income (loss) per common share (in usd per share)	$ (0.35)	$ (0.14)	$ (0.17)	$ (0.47)	$ (5.18)	$ (0.48)	$ (0.91)	$ (0.23)	(1.13)	(8.30)	5.91
Income (loss) from continuing operations per share (in usd per share)									(1.13)	(8.30)	0.89
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share									0.00	0.00	4.96
Diluted net income (loss) per common share (in usd per share)	$ (0.35)	$ (0.14)	$ (0.17)	$ (0.47)	$ (5.18)	$ (0.48)	$ (0.91)	$ (0.23)	(1.13)	(8.30)	5.85
Common Stock, Dividends, Per Share, Declared									$ 0.21	$ 0.28	$ 0.28