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Stock-Based Compensation (Summary of Restricted Stock Units Activity) (Detail) - Restricted Stock Units - $ / shares
6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted Stock Units Outstanding at beginning of period 767,973  
Restricted Stock Units Outstanding, Shares Granted 564,900  
Restricted Stock Units Outstanding, Shares Vested (361,728)  
Restricted Stock Units Outstanding, Shares Forfeited (24,630)  
Restricted Stock Units Outstanding at end of period 946,515  
Weighted Average Grant Date Fair Value, Nonvested beginning balance $ 39.42  
Weighted Average Grant Date Fair Value, Shares Granted 30.62 $ 42.66
Weighted Average Grant Date Fair Value, Shares Vested 34.92  
Weighted Average Grant Date Fair Value, Shares Forfeited 38.88  
Weighted Average Grant Date Fair Value, Nonvested ending balance $ 35.90