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Equity Securities and Stock-Based Compensation (Details 5) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended 36 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2015
Equity Securities and Stock-based Compensation        
Awards granted vesting period 3 years      
Compensation expense related to restricted stock, restricted stock units and the ESPP $ 1.4 $ 0.9 $ 0.7  
Total compensation cost related to unvested awards not yet recognized $ 2.3     $ 2.3
Weighted-average period for recognition of compensation cost 1 year 8 months 12 days      
Restricted stock        
Equity Securities and Stock-based Compensation        
Awards granted vesting period 3 years      
Shares Outstanding, Beginning Balance 151      
Shares, Granted 116      
Shares, Vested (138)      
Shares, Forfeited (3)      
Shares Outstanding, Ending Balance 126 151   126
Weighted-average exercise price, Beginning Balance $ 8.38      
Weighted-average exercise price, Granted 13.03      
Weighted-average exercise price, Vested 9.38      
Weighted-average exercise price, Forfeited 9.85      
Weighted-average exercise price, Ending Balance $ 11.51 $ 8.38   $ 11.51
Officers and Employees | Restricted stock        
Equity Securities and Stock-based Compensation        
Shares, Granted       400