Net Income (Loss) Per Share Net Income (Loss) Per Share - Summary of Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Loss from continuing operations	$ (15,487)	$ 1,640	$ (17,566)	$ (108,077)	$ (9,943)	$ (4,836)	$ (4,453)	$ (11,517)	$ (139,490)	$ (30,749)	$ (221,220)
Less: Preferred Stock cumulative dividends and deemed dividends									(12,373)	(642)	0
Numerator for basic loss from continuing operations per common share									(151,863)	(31,391)	(221,220)
Numerator for diluted loss from continuing operations per common share									(151,863)	(31,391)	(221,220)
Income (loss) from discontinued operations, net of tax (Note 2)	$ 162,864	$ 20,330	$ (4,182)	$ (140,114)	$ (4,142)	$ (1,019)	$ (2,830)	$ (8,001)	38,898	(15,992)	(41,767)
Numerator for basic undistributed net loss per common share									(112,965)	(47,383)	(262,987)
Numerator for diluted undistributed net loss per common share									$ (112,965)	$ (47,383)	$ (262,987)
Weighted average common shares outstanding, basic and diluted (in shares)									42,199	42,030	31,678
Basic loss from continuing operations per common share (in usd per share)	$ (0.44)	$ (0.04)	$ (0.49)	$ (2.64)	$ (0.25)	$ (0.12)	$ (0.11)	$ (0.27)	$ (3.60)	$ (0.75)	$ (6.98)
Basic income (loss) from discontinued operations per common share (in usd per share)									0.92	(0.38)	(1.32)
Basic net loss per common share (in usd per share)	3.41	0.45	(0.59)	(5.96)	(0.35)	(0.14)	(0.17)	(0.47)	(2.68)	(1.13)	(8.30)
Diluted loss from continuing operations per common share (in usd per share)	(0.44)	(0.04)	(0.49)	(2.64)	(0.25)	(0.12)	(0.11)	(0.27)	(3.60)	(0.75)	(6.98)
Diluted income (loss) from discontinued operations per common share (in usd per share)									0.92	(0.38)	(1.32)
Diluted net loss per common share (in usd per share)	$ 3.41	$ 0.45	$ (0.59)	$ (5.96)	$ (0.35)	$ (0.14)	$ (0.17)	$ (0.47)	(2.68)	(1.13)	(8.30)
Cash dividends declared per common share (in usd per share)									$ 0	$ 0.21	$ 0.28