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Stock-Based Compensation (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2017
USD ($)
Plan
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
Plan
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of stock-based compensation plans | Plan 2   2  
2008 Stock Option Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Remaining compensation cost to be recognized | $ $ 0 $ 0 $ 0 $ 0
2008 Stock Option Plan [Member] | Stock Option [Member]        
Stock option activity, shares [Roll Forward]        
Outstanding at beginning of year (in shares)     37,770 64,770
Exercised (in shares)     (4,000) (27,000)
Outstanding at period end (in shares) 33,770 37,770 33,770 37,770
Exercisable at period end (in shares) 33,770 37,770 33,770 37,770
Stock option activity, weighted average exercise price per share [Abstract]        
Outstanding at beginning of year (in dollars per share) | $ / shares     $ 6.25 $ 6.25
Exercised (in dollars per share) | $ / shares     6.25 6.25
Outstanding at period end (in dollars per share) | $ / shares $ 6.25 $ 6.25 6.25 6.25
Exercisable at period end (in dollars per share) | $ / shares $ 6.25 $ 6.25 $ 6.25 $ 6.25
Options outstanding, intrinsic value | $ $ 890 $ 629 $ 890 $ 629
Options exercisable, intrinsic value | $ 890 629 890 629
Options exercised during period, total intrinsic value | $ $ 80 $ 208 $ 103 $ 339
Options granted (in shares) 0 0 0 0