Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Contract Drilling
Goodwill And Intangible Assets Disclosure [Line Items]
Accumulated impairment losses	$ 0		$ 0		$ 0
Pressure Pumping | Customer Relationships
Goodwill And Intangible Assets Disclosure [Line Items]
Amortization period (in years)			7 years
Amortization expense	$ 911,000	$ 911,000	$ 1,800,000	$ 1,800,000