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Net Income Per Share - Additional Information (Detail) (Share-Based Awards [Member])
3 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Share-Based Awards [Member]
   
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Common shares that were not included in computation of diluted net income per share 107,101 503,115