Business Segments - Additional Information (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2021 USD ($) Rigs	Jun. 30, 2020 USD ($)	Dec. 31, 2021 USD ($) Rigs Segment	Dec. 31, 2020 USD ($) Customer	Dec. 31, 2019 USD ($) Customer
Segment Reporting Information [Line Items]
Number of reportable business segments | Segment			3
Impairment charge of drilling equipment		$ 8,300
Total operating revenues			$ 1,357,081	$ 1,124,249	$ 2,470,685
Long-lived assets	$ 2,331,755		2,331,755	$ 2,761,041
Major Customer
Segment Reporting Information [Line Items]
Number of customers accounted for 10% or more of consolidated revenues | Customer				0	0
One customer [Member]
Segment Reporting Information [Line Items]
Total operating revenues			$ 216,000
Consolidated Revenue, Percentage			16.00%
COLOMBIA
Segment Reporting Information [Line Items]
Long-lived assets	39,300		$ 39,300
Rigs and Spare Rig Components That Would No Longer Be Marketed
Segment Reporting Information [Line Items]
Impairment charge of drilling equipment	$ 220,000	$ 8,300			$ 173,000
Contract Drilling
Segment Reporting Information [Line Items]
Marketable land-based drilling rigs | Rigs	184		184
Total operating revenues			$ 664,030	$ 669,126	$ 1,308,350
Contract Drilling | COLOMBIA
Segment Reporting Information [Line Items]
Total operating revenues			$ 15,800