Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ 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]
Net income (loss)	$ 7,400	$ (1,310)	$ 1,681	$ (6,051)	$ (74,912)	$ (10,358)	$ (3,042)	$ (7,383)	$ 1,720	$ (95,695)	$ (100,639)
Weighted average basic common shares outstanding									35,839	37,075	37,457
Effect of dilutive securities - stock options and awards									313
Total shares and dilutive securities									36,152	37,075	37,457
Basic income (loss) per common share	$ 0.21	$ (0.04)	$ 0.05	$ (0.17)	$ (2.02)	$ (0.28)	$ (0.08)	$ (0.20)	$ 0.05	$ (2.58)	$ (2.69)
Diluted income (loss) per common share	$ 0.21	$ (0.04)	$ 0.05	$ (0.17)	$ (2.02)	$ (0.28)	$ (0.08)	$ (0.20)	$ 0.05	$ (2.58)	$ (2.69)