Summary of Significant Accounting Policies - Cash Payments Made for Interest and Income Taxes (Detail) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2018	Aug. 13, 2018	Dec. 31, 2020	Dec. 31, 2019	Jul. 16, 2019
Cash payments for:
Interest payments	$ 8,042	$ 36,187	$ 228,555	$ 149,039
Income tax (payments) refunds	0	(2)	10,218	(2)
Non-cash investing activities include:
Increase (decrease) in accrued capital expenditures	15,301	(3,255)	(17,234)	24,273
Liabilities assumed in exchange for right-of-use lease assets	0	0	1,761	5,372
Non-cash investing and financing activities related to acquisitions
Assumed 7½% senior notes	0	0	0	446,625
Acquired working capital	36,351	0	520	41,365
Non-cash financing activities include:
Retirement of debt in exchange for common stock	0	0	(4,151)	0
Issuance of common stock in exchange for debt	0	0	$ 5,012	0
Covey Park Equity Owners | 7½% Senior Notes Due 2025
Non-cash financing activities include:
Interest rate on debt instrument			7.00%		7.50%
Common Stock
Non-cash investing and financing activities related to acquisitions
Issuance of stock	760,829	0	$ 0	198,633
Series A 10% Convertible Preferred Stock
Non-cash investing and financing activities related to acquisitions
Issuance of stock	$ 0	$ 0	$ 0	$ 200,000