Supplemental Financial Information - Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Deferred contract costs	$ 20,019	$ 70,021
Rig spare parts and supplies	18,250	20,256
Prepaid taxes	12,475	54,412
Current contract assets	6,314	6,832
Prepaid rig costs	2,990	5,247
Prepaid insurance	2,892	2,742
Prepaid software costs	2,319	1,531
Other	3,399	2,355
Total	$ 68,658	$ 163,396