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Summary of Significant Accounting Policies (Stock-Based Compensation) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Effect on income before income taxes (1) $ (1,763) $ (1,470) $ (987) [1]
Effect on income taxes 255 495 429
Effect on net income $ (1,508) $ (975) $ (558)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Risk free interest rate 1.12% 2.00% 2.00%
Expected life (in years) 6 years 6 years 6 years
Dividend rate 0.00% 0.00% 0.00%
Volatility 70.00% 70.00% 69.00%
Maximum
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Option vesting period (in years) 4 years    
Minimum
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Option vesting period (in years) 1 year    
[1] (1) Stock-based compensation expense is included in selling, general and administrative expense