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Stock Based Compensation (Restricted Stock and Restricted Stock Units Activity) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Outstanding at end of period (shares) 5,800    
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 beginning of period (shares) 382 69 66
Granted (shares) 106 362 41
Vested (shares) (165) (49) (29)
Forfeited (shares) 0 0 (9)
Outstanding at end of period (shares) 323 382 69
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 beginning of period $ 7.84 $ 7.21 $ 5.60
Weighted-average fair value of grants $ 9.42 $ 7.82 $ 8.31
Weighted Average Grant Date Fair Value, Vested $ 7.73 $ 6.75 $ 5.60
Weighted-Average Grant Date Fair Value, Forfeited $ 10.64 $ 8.80 $ 5.60
Weighted-Average Grant Date Fair Value, Outstanding at end of period $ 8.41 $ 7.84 $ 7.21
Aggregate Intrinsic Value, Vested $ 1,563,000    
Aggregate Intrinsic Value, Outstanding at September 30, 2012 $ 2,989,000