Drilling and Other Property and Equipment - Additional Information (Detail) $ in Thousands	3 Months Ended	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2020 Rig	Apr. 23, 2021 USD ($) Rig	Dec. 31, 2021 USD ($) Rig	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Fair value adjustment to drilling and other property and equipment net of accumulated depreciation		$ (2,712,100)
Fair value adjustment of BOP finance lease assets		(8,400)
Gain (loss) on disposition of assets		5,486	$ 1,024	$ 7,375	$ (1,072)
Impairment of assets		$ 197,027	$ 132,449	$ 842,016
Number of rigs impaired during period | Rig	1	1	2