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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2012
Summary of Significant Accounting Policies [Abstract]  
Changes in Carrying Amount of Goodwill
                                         
    Completion
and
Remedial
Services
    Fluid
Services
    Well
Servicing
    Contract
Drilling
    Total  

Balance as of December 31, 2011

  $ 72,369     $ 4,086     $ 6,116     $ —       $ 82,571  

Goodwill adjustments

    6,218       203       512       —         6,933  
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 

Balance as of June 30, 2012

  $ 78,587     $ 4,289     $ 6,628     $ —       $ 89,504