Supplemental Financial Information - Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Apr. 23, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Rig operating costs	$ 42,532		$ 21,123
Deferred revenue	38,506		51,763
Payroll and benefits	29,268		30,296
Current operating lease liability	15,998		5,072
Shorebase and administrative costs	5,776		17,275
Personal injury and other claims	5,598		6,495
Interest payable	2,986
Accrued capital project/upgrade costs	2,219		7,075
Other	853		1,689
Change in accrued liabilities	$ 143,736	$ 123,055	$ 140,788