Supplemental Financial Information - Accrued Liabilities (Detail) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Payables and Accruals [Abstract]
Rig operating costs		$ 47,316	$ 42,893
Contract advances		33,225	63,618
Payroll and benefits		26,260	35,215
Interest payable		24,691	13,013
Deferred revenue	[1]	17,833	12,634
Personal injury and other claims		6,217	7,391
Current operating lease liability		8,171	8,436
Accrued capital project/upgrade costs		8,059	10,766
Deposit for equipment sale		5,902	1,977
Shorebase and administrative costs		4,967	5,699
Other		2,491	1,694
Total		$ 185,132	$ 203,336

[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.