Earnings (Loss) Per Share - Schedule of Earnings 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 [Abstract]
Basic earnings (loss) per share	$ 102,097	$ (79,237)	$ 184,975	$ (266,785)
Diluted earnings (loss) per share	$ 102,097	$ (79,237)	$ 184,975	$ (266,785)
Basic	78,962	78,154	78,804	78,153
Effect of dilutive incentive-based awards, Shares	988		1,261
Diluted earnings (loss) per share	79,950	78,154	80,065	78,153
Earnings (loss) per share, basic	$ 1.29	$ (1.01)	$ 2.35	$ (3.41)
Earnings (loss) per share, diluted	$ 1.28	$ (1.01)	$ 2.31	$ (3.41)