Earnings per Share - Calculation of Earnings (Loss) per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Line Items]
Net loss		$ (367,199)	$ (31,477)
Net (income) loss allocated to participating restricted stockholders		0	0
Basic and diluted earnings available to common stockholders		$ (367,199)	$ (31,477)
Common shares/units:
Common shares outstanding — basic		37,568	22,179
Dilutive effect of potential common shares		0	0
Common shares outstanding — diluted		37,568	22,179
Net earnings per share:
Basic		$ (9.77)	$ (1.42)
Diluted		$ (9.77)	$ (1.42)
Warrants [Member]
Net earnings per share:
Antidilutive warrants	[1]	9,154	2,174

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