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Comprehensive Income (Tables)
3 Months Ended
Jun. 30, 2012
Comprehensive Income [Abstract]  
Comprehensive income
                 
    Three months ended
June  30
 
    2012     2011  

Net income

  $ 3,840     $ 3,337  

Foreign currency translation adjustment

    427       —    
   

 

 

   

 

 

 

Comprehensive income

  $ 4,267     $ 3,337