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Stock Based Compensation (Additional Information) (Detail) (USD $)
3 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Authorized shares, stock incentive plans 1,414,579  
Stock Options [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Aggregate intrinsic value of options exercised $ 178,000 $ 397,000
Unrecognized compensation costs 1,600,000  
Weighted-average period recognized 2 years 4 months 24 days  
Restricted Stock Units (RSUs) [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation costs 6,200,000  
Weighted-average period recognized 3 years 9 months 18 days  
Intrinsic value of RSUs vested 91,000 25,000
Total intrinsic value of all outstanding restricted stock units $ 8,300,000