Summary of Significant Accounting Policies - Additional Information 4 (Detail) - USD ($) $ / shares in Units, $ in Thousands		7 Months Ended	9 Months Ended
	Jul. 16, 2019	Aug. 13, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Operations And Summary Of Significant Accounting Policies [Line Items]
Performance multiplier, minimum			0.00%
Performance multiplier, maximum			200.00%
Participating securities that share in losses			0	0
Earliest conversion date for convertible preferred stock			Jul. 16, 2020
Preferred stock, conversion price per share	$ 4.00		$ 4.00
Total common shares if Convertible preferred stock is converted			96,250,000
Interest paid in-kind		$ 25,004
Debt assumed in merger			$ 446,625
7½% Senior Notes due 2025
Operations And Summary Of Significant Accounting Policies [Line Items]
Interest rate on debt instrument			7.50%
Covey Park Equity Owners | 7½% Senior Notes due 2025
Operations And Summary Of Significant Accounting Policies [Line Items]
Debt assumed in merger	$ 625,000
Interest rate on debt instrument	7.50%
Series A Convertible Preferred Stock
Operations And Summary Of Significant Accounting Policies [Line Items]
Number of shares issued as non-cash consideration	210,000
Redemption value of shares	$ 210,000
Fair Value of Shares Issued	$ 200,000
Common Stock
Operations And Summary Of Significant Accounting Policies [Line Items]
Number of shares issued as non-cash consideration	28,800,000
Convertible Notes
Operations And Summary Of Significant Accounting Policies [Line Items]
Interest paid in-kind		$ 25,000
Restricted Stock
Operations And Summary Of Significant Accounting Policies [Line Items]
Shares of unvested restricted stock outstanding		904,181	1,131,918		414,545