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Stock Based Compensation (Narrative) (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
1 Months Ended 12 Months Ended
Sep. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Dec. 15, 2015
Dec. 06, 2012
Dec. 06, 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock options exercised, total intrinsic value   $ 865 $ 1,700 $ 1,713      
Weighted average remaining contractual term   4 years          
Stock issued pursuant to employee stock incentive plans   $ 109 113 77      
Non-cash restricted stock expense   26 22 22      
Non-cash stock option plan expense is included in selling, general and administrative expenses   55 0 21      
Non-cash stock compensation included in selling, general and administrative expenses   6,956 $ 6,719 $ 4,537      
Unrecognized compensation of stock options   $ 95          
Common Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Restricted stock awarded and premium shares vested, common shares   5 7 5      
Stock issued pursuant to employee stock incentive plans            
Restricted Stock | Employees              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock granted, shares   277 221 165      
Restricted stock units, vesting period   3 years 3 years 3 years      
Restricted Stock | Non Employee Directors              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock granted, shares   22 14 12      
Restricted stock units, vesting period   1 year 1 year 1 year      
Performance-vested restricted stock units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock granted, shares   160 142 116      
Upper limit of target grant, shares     248 203      
Performance-vested restricted stock units, vesting percentage   100.00% 100.00% 100.00%      
Restricted stock units, vesting period   3 years 3 years 3 years      
Restricted stock awards and restricted stock units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Non-cash stock option plan expense is included in selling, general and administrative expenses   $ 6,875 $ 6,697 $ 4,494      
Common stock granted, shares   501          
Remaining stock-based compensation expense   $ 8,382          
Remaining stock-based compensation expense, period for recognition   1 year 9 months 18 days          
Restricted stock units              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Upper limit of target grant, shares   280          
Restricted stock units | Employees              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Common stock granted, shares   42 46 67      
Performance Stock Options | Executive Officer              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares granted 28            
Exercise price of performance options granted $ 20.03            
Target price performance stock options $ 40            
Number of trading days 20 days            
Explicit service period 1 year            
Expiration date of stock options Jun. 30, 2021            
Expiration period of option if target price achieved 10 years            
Stock Option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares granted   28          
Exercise price of performance options granted   $ 20.03      
Weighted average grant date fair value, Granted   $ 5.44          
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    
Shares of common stock available for grant   3,144          
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  
Shares of common stock available for grant   255          
2007 Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Maximum number of shares of common stock that may be issued             700
Shares of common stock available for grant   0