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Stock-based Compensation (Details) (USD $)
3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2012
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Stock Options [Member]
Jun. 30, 2012
SSARs / Stock Options [Member]
Jun. 30, 2012
SSARs / Stock Options [Member]
Jun. 30, 2012
Nonvested Stock Awards [Member]
Sep. 30, 2011
Nonvested Stock Awards [Member]
Jun. 30, 2012
Performance Shares [Member]
Jun. 30, 2012
Nonvested Stock Awards and Performance Shares [Member]
Jun. 30, 2012
Nonvested Stock Awards and Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Total stock-based compensation included in general and administrative expenses $ 700,000                    
Total stock-based compensation included in general and administrative expenses, net of tax 500,000                    
Number of shares surrendered by emloyees (shares)   12,553 39,861                
Aggregate value of shares surrendered   34,000 163,000                
Intrinsic value of SSAR/stock options outstanding         600,000 600,000          
Aggregate intrinsic value of SSARs/stock options vested and expected to vest         600,000 600,000          
SSARs/stock options weighted average expected life (years)           2 years 10 months 24 days          
Unrecognized compensation costs related to non-vested stock awards             2,800,000 4,000,000      
Weighted average period to recognize remaining cost (years)             1 year 6 months        
Increase in target number of Performance Shares (percent)                 50.00%    
Non-vested stock performance period (years)                 3 years    
Expected dividend yield on performance shares (percent)                 0.00%    
Expected volatility rate range minimum (percent)                 36.00%    
Expected volatility rate range maximum (percent)                 61.10%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions [Abstract]                      
Expected life of options       5 years              
Expected volatility       44.77%              
Expected discrete dividends       $ 0              
Weighted average risk-free interest rate       0.90%         0.43%    
Weighted average fair value       $ 0.86              
Share-based Compensation Arrangement by Share-based Payment Award, Outstanding [Roll Forward]                      
Shares outstanding at beginning of period (shares)         2,281,684 1,876,238          
Granted (shares)         0 547,536       29,419 899,565
Expired (shares)         (7,437) (54,740)          
Forfeited (shares)         (84,637) (179,424)          
Shares outstanding at end of period (shares)         2,189,610 2,189,610          
Exercisable at end of period         1,081,992 1,081,992          
Vested or expected to vest in the future (shares)         2,177,069 2,177,069          
Share-based Compensation Arrangement by Share-based Payment Award, Outstanding, Weighted Average Exercise Price [Roll Forward]                      
Weighted average exercise price of shares outstanding at beginning of period         $ 7.96 $ 9.77          
Weighted average exercise price of shares granted         $ 0.00 $ 2.16          
Weighted average exercise price of shares expired         $ 4.87 $ 16.50          
Weighted average exercise price of shares forfeited         $ 4.65 $ 4.82          
Weighted average exercise price of shares outstanding at beginning of period         $ 8.10 $ 8.10          
Weighted average exercise price of shares exercisable at end of period         $ 12.85 $ 12.85          
Weighted average exercise price of shares vested or expected to vest in the future         $ 8.12 $ 8.12          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]                      
Shares outstanding at beginning of period (shares)                   2,158,968 1,440,397
Granted (shares)         0 547,536       29,419 899,565
Shares vested (shares)                   (17,647) (72,415)
Shares forfeited (shares)                   (109,554) (206,361)
Shares outstanding at end of period (shares)                   2,061,186 2,061,186
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]                      
Weighted average grant date fair value of shares outstanding at beginning of period                   $ 4.45 $ 6.77
Weighted average grant date fair value of shares granted                 $ 1.13 $ 3.00 $ 1.44
Weighted average grant date fair value of shares vested in period                   $ 34.00 $ 21.23
Weighted average grant date fair value of shares forfeited in period                   $ 9.02 $ 6.86
Weighted average grant date fair value of shares outstanding at end of period                   $ 3.93 $ 3.93