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Stock Based Compensation (Narrative) (Detail) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Jun. 30, 2015
Dec. 15, 2015
Dec. 06, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense     $ 4,965 $ 3,407      
2015 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Maximum number of shares of common stock that may be issued           4,250  
2010 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Maximum number of shares of common stock that may be issued             5,250
Restricted stock | Employees              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock granted, shares     221   165    
Restricted stock units, vesting period     3 years   3 years    
Restricted stock | Non-employee directors              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock granted, shares     14   12    
Restricted stock units, vesting period     1 year   1 year    
Restricted stock units | Employees              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock granted, shares     46   67    
Performance-vested restricted stock units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock granted, shares     142   116    
Upper limit of target grant, shares     248   203    
Performance-vested restricted stock units, vesting percentage at the end of third year     100.00%   100.00%    
Restricted stock and restricted stock units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense $ 1,753 $ 1,123 $ 4,948 $ 3,368      
Total unrecognized compensation cost $ 9,746   $ 9,746