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Stock-Based Compensation (Summary of Restricted Stock Units Activity) (Detail) - Restricted Stock Units - $ / shares
9 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted Stock Units Outstanding at beginning of period 878,030  
Restricted Stock Units Outstanding, Shares Granted 408,520  
Restricted Stock Units Outstanding, Shares Vested (362,036)  
Restricted Stock Units Outstanding, Shares Forfeited (121,914)  
Restricted Stock Units Outstanding at end of period 802,600  
Weighted Average Grant Date Fair Value, Nonvested beginning balance $ 34.86  
Weighted Average Grant Date Fair Value, Shares Granted 42.38 $ 49.57
Weighted Average Grant Date Fair Value, Shares Vested 28.75  
Weighted Average Grant Date Fair Value, Shares Forfeited 40.17  
Weighted Average Grant Date Fair Value, Nonvested ending balance $ 39.08