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Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common Stock, Shares Authorized 100,000,000   100,000,000   100,000,000
Common Stock, Shares, Outstanding 21,434,086   21,434,086   21,456,539
Equity Class Of Treasury Stock [Line Items]          
Residual Shares Related To Acquisition Returned to Treasury Stock       6,859  
The 2006 Equity Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Common Stock, Shares Authorized 3,000,000   3,000,000    
Common shares repurchased for tax withholding     4,575 6,084  
Unvested shares forfeited       7,500  
Available Common Stock Authorized Shares 1,055,391   1,055,391    
The 2015 Stock Repurchase Program [Member]          
Equity Class Of Treasury Stock [Line Items]          
Approved Number of shares to be repurchased 1,500,000   1,500,000    
Treasury Stock Shares Acquired 51,673   51,673 46,929  
Average Share Price $ 15.68   $ 15.68    
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Recognized compensation expense $ 133 $ 130 $ 406 $ 392  
Unamortized compensation cost 408   $ 408    
Performance Cash Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares issued under share based compensation program     30,000    
Recognized compensation expense 59 0 $ 252 0  
Description of Share Based Award Type     PPCUs are a contractual right to cash payment of $20 dollars per PPCU. The PPCUs will generally become vested, if at all, upon achievement of certain specified performance objectives and continued performance of services through mid-December 2018.    
Phantom Share Units PSUs [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Recognized compensation expense 41 34 $ 125 102  
Performance Based Phantom Share Units PPSUs [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares issued under share based compensation program     408,000    
Recognized compensation expense 225 22 $ 753 65  
Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Recognized compensation expense 0 $ 17 23 $ 50  
Unamortized compensation cost $ 0   $ 0    
Unrestricted Stock [Member] | The 2006 Equity Incentive Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares issued under share based compensation program     32,250 27,500  
Unrestricted Stock [Member] | The 2006 Equity Incentive Plan [Member] | Director [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares issued under share based compensation program     1,545 4,714