Supplemental Financial Information - Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Deferred contract costs	$ 23,280	$ 19,808
Prepaid taxes	15,312	16,112
Rig spare parts and supplies	13,007	12,606
Deferred debt issuance costs	12,430
Collateral deposits	8,625
Current contract assets	3,196	2,870
Prepaid rig costs	2,548	2,317
Prepaid legal retainers	2,309	2,408
Prepaid insurance	2,196	2,446
Other	6,763	3,708
Total	$ 89,666	$ 62,275