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Net Income Per Share - Additional Information (Detail) - shares
3 Months Ended 9 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
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 1,558,936 2,818,358 1,434,049 2,427,566