Supplemental Financial Information - Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Payables And Accruals [Abstract]
Accrued capital project/upgrade costs	$ 56,603	$ 37,379
Payroll and benefits	42,494	47,564
Rig operating expenses	37,969	42,323
Interest payable	28,234	28,234
Current operating lease liability	20,030
Deferred revenue	9,573	2,803
Personal injury and other claims	7,074	5,544
Shorebase and administrative costs	5,275	6,217
Other	3,528	2,164
Total	$ 210,780	$ 172,228