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Share-Based Compensation (Narrative) (Details)
12 Months Ended
Dec. 08, 2017
shares
Sep. 11, 2017
shares
Jun. 30, 2018
USD ($)
plan
tranche
shares
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of share-based compensation plans | plan     2    
Options granted during period (in shares)     119,132    
Total aggregate intrinsic value of options exercised | $     $ 500,000 $ 1,600,000 $ 1,300,000
Fair value of options vested during period | $     $ 1,300,000 $ 1,500,000 $ 1,500,000
Stock Options [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Options granted during period (in shares)     119,132    
Vesting period (years)     3 years    
Contractual life (years)     10 years    
Exercise price percentage of fair market value at grant date     100.00%    
Unrecognized compensation cost | $     $ 1,600,000    
Weighted-average period of recognition of unrecognized compensation cost (years)     1 year 1 month 13 days    
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost | $     $ 6,600,000    
Weighted-average period of recognition of unrecognized compensation cost (years)     1 year 2 months 23 days    
Shares granted (in shares)     138,665    
Number of tranches | tranche     3    
Shares withheld for income taxes for share based compensation (in shares)     47,470    
2013 Long-Term Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available for future grant (in shares)     3,786,727    
Non-Employee Directors, Certain Directors [Member] | 2013 Long-Term Incentive Plan [Member] | Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period (years) 6 months 6 months      
Shares granted (in shares) 14,400 500      
Amount to be divided by fair market value of common stock | $     $ 100,000    
Number of days to calculate average value per share     45 days