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Acquisitions - Additional Information (Detail)
$ in Millions
1 Months Ended 12 Months Ended
Oct. 31, 2014
hp
Jun. 30, 2014
hp
Dec. 31, 2014
USD ($)
PressurePumpingEquipments
Business Acquisition [Line Items]      
Hydraulic fracturing equipment purchased in the acquisition | hp 148,250 31,500  
Payments to acquire businesses     $ 176.0
Revenue from acquired business     80.8
Operating income (loss) from acquired business     $ 13.7
Pressure Pumping      
Business Acquisition [Line Items]      
Number of pressure pumping acquisitions | PressurePumpingEquipments     2