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Acquisition (Tables)
3 Months Ended
Mar. 31, 2012
Acquisition [Abstract]  
Pro Forma Consolidated Results Of Operations
     Three Months
Ended
March 31,
2011
 

Revenue

   $ 663,657   

Net income

   $ 11,311   

Earnings per share

  

Basic

   $ 0.31   

Diluted

   $ 0.31