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Comprehensive Income (Tables)
3 Months Ended
Jun. 30, 2011
Comprehensive Income  
Schedule of Comprehensive Income
     Three Months Ended
June 30,
 
     2011      2010  

Net income

   $ 2,399       $ 7,145   

Unrealized gain (loss) on cash equivalents, marketable securities and restricted investment, net of tax

     89         470   

Unrealized gain (loss) on hedge contracts, net of tax

     5         (185
                 

Comprehensive income

   $ 2,493       $ 7,430