Restructuring Expenses - Restructuring Expenses by Reportable Segment (Detail) - Operating Segments $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)
Restructuring Cost And Reserve [Line Items]
Severance costs	$ 6,500
Contract termination costs	20,373
Other exit costs	1,544
ROU asset abandonments	9,921
Total	38,338
Contract Drilling
Restructuring Cost And Reserve [Line Items]
Severance costs	1,821
Other exit costs	523
ROU asset abandonments	86
Total	2,430
Pressure Pumping
Restructuring Cost And Reserve [Line Items]
Severance costs	3,460
Contract termination costs	20,373
Other exit costs	194
ROU asset abandonments	7,304
Total	31,331
Directional Drilling
Restructuring Cost And Reserve [Line Items]
Severance costs	503
Other exit costs	827
ROU asset abandonments	1,845
Total	3,175
Other Operations
Restructuring Cost And Reserve [Line Items]
Severance costs	501
Total	501
Corporate
Restructuring Cost And Reserve [Line Items]
Severance costs	215
ROU asset abandonments	686
Total	$ 901