Gross Carrying Amount and Accumulated Amortization of Intangible Assets (Detail) - Customer Relationships - Pressure Pumping - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Acquired Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 25,500	$ 25,500
Accumulated Amortization	(21,857)	(19,125)
Net Carrying Amount	$ 3,643	$ 6,375