Supplemental Financial Information - Accrued Liabilities (Detail) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Rig operating costs		$ 39,811	$ 39,288
Contract advances		36,036	52,743
Payroll and benefits		29,032	29,408
Deferred revenue	[1]	12,298	11,513
Accrued capital project/upgrade costs		11,697	8,419
Current operating lease liability		10,612	13,480
Personal injury and other claims		5,267	3,738
Shorebase and administrative costs		4,820	4,365
Deposit for equipment sale		4,368	1,670
Interest payable		3,942	1,897
Other		1,217	264
Change in accrued liabilities		$ 159,100	$ 166,785

[1] Contract assets and contract liabilities may reflect balances which have been netted together on a contract basis. Net current contract asset and liability balances are included in “Prepaid expenses and other current assets” and “Accrued liabilities,” respectively, and net noncurrent contract liability balances are included in “Other liabilities” in our unaudited Condensed Consolidated Balance Sheets.