Supplemental Financial Information - Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Rig spare parts and supplies	$ 25,343	$ 42,804
Deferred mobilization costs	61,488	52,965
Prepaid BOP Lease	3,873
Prepaid insurance	3,771	4,483
Prepaid taxes	2,894	14,969
Other	4,742	4,258
Total	$ 102,111	$ 119,479