(Loss) Earnings per Share - Schedule of (Loss) Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Basic (loss) earnings per share, Per Share Amount	$ (3.99)	$ 1.11	$ 0.52
Diluted (loss) earnings per share, Per Share Amount	$ (3.99)	$ 1.10	$ 0.52
Basic (loss) earnings per share	78,194	80,309	86,170
Effect of dilutive incentive-based awards, Shares		735	740
Diluted (loss) earnings per share	78,194	81,044	86,910
Basic (loss) earnings per share	$ (312,321)	$ 89,476	$ 44,788
Diluted (loss) earnings per share	$ (312,321)	$ 89,476	$ 44,788