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Goodwill and Intangible Assets - Additional Information (Detail) (USD $)
 1 Months Ended 12 Months Ended
Oct. 31, 2010
Dec. 31, 2011
Year
Dec. 31, 2010
Goodwill and Intangible Assets Disclosure [Line Items]      
Accumulated impairment losses   $ 0 $ 0
Amortization expense   4,100,000 1,000,000
Non-compete agreement
      
Goodwill and Intangible Assets Disclosure [Line Items]      
Contract term 3 years    
Amortization period (in years)   3  
Amortization expense   467,000 116,000
Customer relationships
      
Goodwill and Intangible Assets Disclosure [Line Items]      
Amortization period (in years)   7  
Amortization expense   3,600,000 910,000
Pressure Pumping
      
Goodwill and Intangible Assets Disclosure [Line Items]      
Goodwill expected to be deductible for tax purposes     $ 53,200,000