Asset Impairments - Additional Information (Detail) $ in Thousands	3 Months Ended				4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2021 Rig	Mar. 31, 2021 Rig	Dec. 31, 2020 Rig	Mar. 31, 2020 USD ($) Rig	Apr. 23, 2021 USD ($) Rig	Dec. 31, 2021 USD ($) Rig	Dec. 31, 2021 Rig	Dec. 31, 2020 USD ($)
Schedule Of Asset Impairment Charges [Line Items]
Number of rigs impaired during period			1		1	2
Loss on impairment of assets | $					$ 197,027	$ 132,449		$ 842,016
2021 Impaired Rigs [Member]
Schedule Of Asset Impairment Charges [Line Items]
Number of rigs evaluated for impairment	3						1
Number of rigs impaired during period	2	1
Loss on impairment of assets | $					$ 197,000	$ 132,400
2020 Impaired Rigs [Member]
Schedule Of Asset Impairment Charges [Line Items]
Number of rigs evaluated for impairment			3	5
Number of rigs impaired during period			1	4
Loss on impairment of assets | $				$ 774,000
Impaired long-lived assets held and used, method for determining fair value							We estimated the fair values of the 2020 Impaired Rigs using an income approach, as described above. Our fair value estimates were representative of Level 3 fair value measurements due to the significant level of estimation involved and the lack of transparency as to the inputs used.
2020 Impaired Rigs [Member] | Previously Impaired Rig [Member]
Schedule Of Asset Impairment Charges [Line Items]
Loss on impairment of assets | $								$ 68,000