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Stock Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2015
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 241 $ 317      
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of share options granted 0 0 0 0  
Intrinsic value of the options exercised   $ 1,780 $ 3,762    
Unrecognized compensation cost related to non-vested options granted         $ 0
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation, period of recognition 2 years 6 months 2 years 3 months 18 days      
Restricted stock granted 468,000 521,000      
Total fair value of restricted stock awards vested $ 24,596 $ 38,344 $ 19,402    
Unrecognized compensation cost related to non-vested restricted stock $ 32,886 $ 24,740      
1997 Employee Stock Purchase Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares authorized for issuance under stock incentive plan 1,800,000        
Shares available for future grant 118,000        
Purchase price as a percentage of the lesser of the market value of such shares at either the beginning or the end of each nine-month offering period 85.00%        
Percentage of employee compensation that may be uses to purchase common stock through payroll deductions, maximum 10.00%        
Number of share options granted 102,000 82,000 96,000