Business Segments - Identifiable Assets (Detail) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total assets		$ 2,957,848	$ 3,299,069	$ 4,439,615
Other Operations
Segment Reporting Information [Line Items]
Total assets		85,932	88,676	128,290
Contract Drilling | Operating Segments
Segment Reporting Information [Line Items]
Total assets		2,169,501	2,315,318	3,190,463
Pressure Pumping | Operating Segments
Segment Reporting Information [Line Items]
Total assets		458,202	486,702	695,570
Directional Drilling | Operating Segments
Segment Reporting Information [Line Items]
Total assets		87,285	107,807	164,273
Corporate Segment
Segment Reporting Information [Line Items]
Total assets	[1]	$ 156,928	$ 300,566	$ 261,019

[1] Corporate assets primarily include cash on hand and certain property and equipment