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Stock Based Compensation (Restricted Stock and Restricted Stock Units Activity) (Details) (Restricted Stock Units (RSUs), USD $)
In Thousands, except Per Share data, unless otherwise specified
6 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Restricted Stock Units (RSUs)
   
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Outstanding at September 30, 2012 323  
Granted 121  
Vested (168)  
Forfeited 0  
Outstanding at March 31, 2013 276  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]    
Wieghted-Average Grant Date Fair Value, Outstanding at September 30, 2012 $ 8.41  
Wieghted average grant date fair value, grants $ 9.14 $ 9.36
Wieghted average grant date fair value, vested $ 7.90  
Wieghted average grant date fair value, forfeited $ 0.00  
Weighted-Average Grant Date Fair Value, Outstanding at March 31, 2013 $ 9.05  
Aggregate Intrinsic Value, Vested $ 1,572,000  
Aggregate Intrinsic Value, Outstanding at March 31, 2013 $ 2,528,000