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Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Sep. 30, 2017
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 21,205,536   21,205,536   21,336,975
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     32,832 4,575  
Available Common Stock Authorized Shares 1,092,503   1,092,503    
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 20,810 51,673 100,627 51,673  
Average Share Price $ 15.45 $ 15.68 $ 15.41 $ 15.68  
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Recognized compensation expense $ 11 $ 133 $ 256 $ 406  
Performance Cash Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Recognized compensation expense   59 $ 0 252  
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 49 41 $ 140 125  
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     399,027    
Recognized compensation expense $ (343) $ 225 $ (792) 753  
Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Recognized compensation expense       $ 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     1,500 32,250  
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     520 1,545