Business Segments - Capital Expenditures (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Capital expenditures	$ 347,512	$ 641,458	$ 567,087
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	4,612	2,426	1,884
Operating Segments | Contract Drilling
Segment Reporting Information [Line Items]
Capital expenditures	194,416	394,595	354,425
Operating Segments | Pressure Pumping
Segment Reporting Information [Line Items]
Capital expenditures	105,803	173,848	171,436
Operating Segments | Directional Drilling
Segment Reporting Information [Line Items]
Capital expenditures	15,549	35,929	7,795
Other Operations
Segment Reporting Information [Line Items]
Capital expenditures	$ 27,132	$ 34,660	$ 31,547