Supplemental Financial Information - Accrued Liabilities (Detail) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Payables and Accruals [Abstract]
Rig operating costs		$ 39,479	$ 42,532
Payroll and benefits		29,651	29,268
Deferred revenue	[1]	25,833	38,506
Contract advances		20,880
Current operating lease liability		15,991	15,998
Interest payable		4,331	2,986
Shorebase and administrative costs		4,265	5,776
Personal injury and other claims		3,960	5,598
Accrued capital project/upgrade costs		2,226	2,219
Other		3,537	853
Change in accrued liabilities		$ 150,153	$ 143,736

[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.