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, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ 1,640	$ (4,836)	$ (124,003)	$ (20,806)
Less: Preferred Stock cumulative dividends and deemed dividends	(3,139)	0	(9,133)	0
Numerator for basic income (loss) from continuing operations per common share	(1,499)	(4,836)	(133,136)	(20,806)
Numerator for diluted income (loss) from continuing operations per common share	(1,499)	(4,836)	(133,136)	(20,806)
Income (loss) from discontinued operations, net of tax (Note 2)	20,330	(1,019)	(123,966)	(11,850)
Numerator for basic undistributed net loss per common share	18,831	(5,855)	(257,102)	(32,656)
Numerator for diluted undistributed net loss per common share	$ 18,831	$ (5,855)	$ (257,102)	$ (32,656)
Weighted average common shares outstanding, basic and diluted (in shares)	42,202	42,038	42,170	42,013
Basic income (loss) from continuing operations per common share (in dollars per share)	$ (0.04)	$ (0.12)	$ (3.16)	$ (0.50)
Basic income (loss) from discontinuing operations per common share (in dollars per share)	0.49	(0.02)	(2.94)	(0.28)
Basic net income (loss) per share (in dollars per share)	0.45	(0.14)	(6.10)	(0.78)
Diluted income (loss) from continuing operations per common share (in dollars per share)	(0.04)	(0.12)	(3.16)	(0.50)
Diluted income (loss) from discontinuing operations per common share (in dollars per share)	0.49	(0.02)	(2.94)	(0.28)
Diluted net income (loss) per share (in dollars per share)	0.45	(0.14)	(6.10)	(0.78)
Cash dividends declared per share (in dollars per share)	$ 0	$ 0.07	$ 0	$ 0.21