Net Income (Loss) Per Common Share - Summary of Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted Average Number of Shares Issued, Basic	43,034	42,746	42,980	42,696
Income (loss) from continuing operations	$ (3,377)	$ 1,640	$ (13,681)	$ (124,003)
Less: Preferred stock cumulative dividends and deemed dividends	(2,314)	(3,139)	(19,054)	(9,133)
Numerator for basic income (loss) from continuing operations per common share	(5,691)	(1,499)	(32,735)	(133,136)
Numerator for diluted income (loss) from continuing operations per common share	(5,691)	(1,499)	(32,735)	(133,136)
Income (loss) from discontinued operations, net of tax (Note 2)	0	20,330	0	(123,966)
Numerator for basic undistributed net loss per common share	(5,691)	18,831	(32,735)	(257,102)
Numerator for diluted undistributed net loss per common share	$ (5,691)	$ 18,831	$ (32,735)	$ (257,102)
Weighted Average Number of Shares, Restricted Stock	(476)	(544)	(459)	(526)
Weighted average common shares outstanding, diluted (in shares)	44,455	42,202	43,862	42,170
Basic loss from continuing operations per common share (in dollars per share)	$ (0.13)	$ (0.04)	$ (0.75)	$ (3.16)
Basic loss from discontinuing operations per common share (in dollars per share)	0	0.49	0	(2.94)
Basic net loss per share (in dollars per share)	(0.13)	0.45	(0.75)	(6.10)
Diluted loss from continuing operations per common share (in dollars per share)	(0.13)	(0.04)	(0.75)	(3.16)
Diluted loss from discontinuing operations per common share (in dollars per share)	0	0.49	0	(2.94)
Diluted net loss per share (in dollars per share)	(0.13)	0.45	(0.75)	(6.10)
Cash dividends declared per share (in dollars per share)	$ 0	$ 0	$ 0	$ 0
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	1,897	0	1,341	0
Weighted Average Number of Shares Outstanding, Basic and Diluted	44,455	42,202	43,862	42,170