General Information - Additional Information (Detail) $ in Thousands	1 Months Ended	4 Months Ended	8 Months Ended	12 Months Ended
	Feb. 28, 2022 USD ($)	Apr. 23, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2022 USD ($) Rig	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Significant Accounting Policies [Line Items]
Number of offshore rigs owned | Rig				14
Survey Costs			$ 900	$ 3,300
Net book value of assets			1,175,895	1,141,908	$ 1,175,895	$ 4,122,809
Gain (loss) on disposition of assets		$ 5,486	1,024	$ 4,895		$ 7,375
Period considered to treat short-term, highly liquidity investments as cash equivalents				three months or less
Amount capitalized for asset replacements and betterments		$ 59,900	22,000	$ 69,100
Minimum [Member]
Significant Accounting Policies [Line Items]
Deferral and amortization costs incurred period				2 years 6 months
Estimated useful life for drilling rigs and equipment				3 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Deferral and amortization costs incurred period				5 years
Estimated useful life for drilling rigs and equipment				30 years
Contract Drilling [Member]
Significant Accounting Policies [Line Items]
Amortized deferred survey costs			200	$ 700
Prepaid Expenses and Other Current Assets [Member]
Significant Accounting Policies [Line Items]
Survey Costs				800	500
Other Assets [Member]
Significant Accounting Policies [Line Items]
Survey Costs				$ 2,500	200
Ultra-deepwater Drillship [Member]
Significant Accounting Policies [Line Items]
Number of offshore rigs owned | Rig				4
Semisubmersible Rigs [Member]
Significant Accounting Policies [Line Items]
Number of offshore rigs owned | Rig				8
Ocean Valor [Member]
Significant Accounting Policies [Line Items]
Net book value of assets			$ 1,000		$ 1,000
Gain (loss) on disposition of assets	$ 4,000
Managed rigs [Member]
Significant Accounting Policies [Line Items]
Number of offshore rigs owned | Rig				2