Earnings per Share - Calculation of Earnings (Loss) per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Line Items]
Net income (loss)		$ (464,030)	$ (35,197)
Less: Net income (loss) allocated to participating restricted stockholders		0	0
Basic and diluted earnings available to common stockholders		$ (464,030)	$ (35,197)
Weighted average common shares outstanding:
Common shares outstanding — basic		37,612	29,301
Common shares outstanding — diluted		37,612	29,301
Earnings (loss) per share: (See Note 11)
Basic		$ (12.34)	$ (1.20)
Diluted		$ (12.34)	$ (1.20)
Warrants [Member]
Earnings (loss) per share: (See Note 11)
Antidilutive stock options or warrants	[1]	2,174	9,154

[1] Amount represents warrants to purchase common stock that are excluded from the diluted net earnings per share calculations because of their antidilutive effect.