Supplemental Financial Information - Accrued Liabilities (Detail) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Contract advances		$ 63,618	$ 52,743
Rig operating costs		42,893	39,288
Payroll and benefits		35,215	29,408
Interest payable		13,013	1,897
Deferred revenue	[1]	12,634	11,513
Accrued capital project/upgrade costs		10,766	8,419
Current operating lease liability		8,436	13,480
Personal injury and other claims		7,391	3,738
Shorebase and administrative costs		5,699	4,365
Deposit for equipment sale		1,977	1,670
Other		1,694	264
Change in accrued liabilities		$ 203,336	$ 166,785

[1] Contract assets and contract liabilities may reflect balances that 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 asset and liability balances are included in “Other assets” and “Other liabilities,” respectively, in our Consolidated Balance Sheets as of December 31, 2023 and 2022.