Earnings Per Share - Calculation of Basic and Diluted Net Loss per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
BASIC EPS:
Net loss attributed to common stockholders	$ (106,413)	$ (434,722)
Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock	187,677	190,674
Basic net loss per common share	$ (0.57)	$ (2.28)
DILUTED EPS:
Net loss attributed to common stockholders	$ (106,413)	$ (434,722)
Weighted average number of common shares outstanding, excluding non-vested shares of restricted stock	187,677	190,674
Weighted average number of diluted common shares outstanding	187,677	190,674
Diluted net loss per common share	$ (0.57)	$ (2.28)
Potentially dilutive securities excluded as anti-dilutive	8,941	9,200