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Acquisitions - Changes in Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Aug. 05, 2011
Accounts receivable
Aug. 05, 2011
Edge Oilfield Services, LLC and Summit Oilfield Services, LLC
Aug. 05, 2011
Edge Oilfield Services, LLC and Summit Oilfield Services, LLC
Cash and cash equivalents
Aug. 05, 2011
Edge Oilfield Services, LLC and Summit Oilfield Services, LLC
Accounts receivable
Aug. 05, 2011
Edge Oilfield Services, LLC and Summit Oilfield Services, LLC
Other current assets
Aug. 05, 2011
Edge Oilfield Services, LLC and Summit Oilfield Services, LLC
Other long term assets
Aug. 05, 2011
Edge Oilfield Services, LLC and Summit Oilfield Services, LLC
Current liabilities
Business Acquisition [Line Items]                    
Estimated fair values of assets acquired       $ 21,100   $ 886 $ 21,124 $ 234 $ 3,826  
Property and equipment         87,185          
Intangible assets         49,310          
Other long term assets         162,565          
Current liabilities                   19,406
Total liabilities assumed         19,406          
Net identifiable assets acquired         143,159          
Goodwill 624,875 626,481 622,773   162,704          
Net assets acquired         $ 305,863