Quarterly Financial Information (Unaudited) - Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								8 Months Ended	12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 77,929	$ 72,959	$ 59,532	$ 65,155	$ 75,702	$ 85,522	$ 90,988	$ 87,932	$ 205,479	$ 275,575	$ 340,144
Operating income (loss)	(23,054)	14,807	23,527	(27,251)	87,014	3,206	(18,226)	9,529	(816)	(11,971)	81,523
Net income (loss)	(27,518)	5,157	18,641	(31,477)	79,247	(2,598)	(25,279)	3,239	1,286	(35,197)	54,609
Net income (loss) attributable to Successor	(27,518)	5,157	18,641	(31,477)	79,247	(2,598)	(25,279)	3,239	1,286	(35,197)	54,609
Net income (loss) available to common stockholders	$ (27,518)	$ 5,029	$ 17,913	$ (31,477)	$ 75,727	$ (2,598)	$ (25,279)	$ 3,156	$ 1,251	$ (35,197)	$ 52,183
Basic and diluted earnings per share	$ (0.71)	$ 0.15	$ 0.80	$ (1.42)	$ 3.06	$ (0.10)	$ (1.01)	$ 0.13	$ 0.05	$ (1.20)	$ 2.09