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Stock Benefit Plans - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Nov. 30, 2009
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   $ 8,898,000 $ 10,968,000 $ 9,855,000  
Recognition of related excess tax benefits   0 $ 0 $ 0  
Total unrecognized compensation expense related to stock options   $ 1,800,000      
Unvested stock options weighted average period (in years)   3 years 18 days      
Service-based RSUs weighted average period (in years)   2 years 5 months 12 days      
Market-based RSUs weighted average period (in years)   1 year 2 months 20 days      
2010 Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
General contractual term for stock options granted to employees   7 years      
Common stock reserved for issuance   15,920,578      
Percentage of common stock reserved for issuance to be increased   5.00%      
Maximum number of shares that may be issued   30,000,000      
Shares available for issuance   13,825,928      
Directors' Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common stock reserved for issuance   3,359,964      
Shares available for issuance   1,498,539      
Number of common stock shares increased in reserve for annual basis   200,000      
Stock options [Member] | 2010 Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   4 years      
Stock options vesting percentage one year from the date of grant   25.00%      
Remaining stock option vesting percentage over the three years period thereafter   75.00%      
Stock options [Member] | Directors' Plan [Member] | Annual Grant [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   1 year      
Stock options [Member] | Directors' Plan [Member] | Initial Grant [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 4 years        
RSUs [Member] | 2010 Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   4 years     5 years
RSUs vesting percentage one year from the date of grant   25.00%     15.00%
RSUs vesting percentage over the following three years         60.00%
Remaining RSUs vesting percentage         25.00%
Remaining RSUs vesting quarterly thereafter percentage   6.25%      
RSUs [Member] | Directors' Plan [Member] | Initial Grant [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period   4 years 4 years 4 years  
Service-based RSU [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total unrecognized compensation expense   $ 7,200,000      
Market-based RSUs [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total unrecognized compensation expense   $ 1,000,000