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Acquisitions (Tables)
6 Months Ended
Jun. 30, 2012
Acquisitions [Abstract]  
Schedule of revenue and earnings of combined entity
                 
    Revenue     Earnings  
    (unaudited)     (unaudited)  

Actual from 01/01/2012 - 06/30/2012

  $ 1,962     $ (253
     

Supplemental pro forma from 01/02/2011 to 07/02/2011

  $ 107,375     $ 20,116