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Share-Based Compensation (Details) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares that may be issued pursuant to the plan (in shares) 1,000,000   1,000,000  
Document Period End Date     Mar. 31, 2016  
Shares available for grant under the plan (in shares) 747,000   747,000  
Tax benefit related to share-based compensation       $ 9,000
Vesting period     Upon satisfaction of the performance objectives, unvested shares are issued to the recipients and vest in one-third increments each August 31 subsequent to achieving the performance objectives as long as the recipients are employees throughout each such service period.  
Unvested shares remaining at end of period   39,000   39,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 1,600      
Allocated Share-based Compensation Expense $ 69,000 $ 210,000 $ 383,000 $ 1,035,000
Number of shares [Abstract]        
Unvested participating shares outstanding 28,000 39,000 28,000 39,000
2015 Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Grant date fair value $ 787,000   $ 787,000  
Allocated Share-based Compensation Expense $ 69,000   $ 214,000  
Number of shares [Abstract]        
Granted (in shares) 39,000      
2014 Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Grant date fair value   $ 773,000   $ 773,000
Unvested shares remaining at end of period 28,000   28,000  
Allocated Share-based Compensation Expense   $ 210,000   $ 592,000
Number of shares [Abstract]        
Granted (in shares)   39,000    
2014 stock awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Grant date fair value $ 169,000   $ 169,000  
Number of shares [Abstract]        
Granted (in shares)     8,400