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Stock-based Compensation (Details) (USD $)
3 Months Ended 3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Stock Options [Member]
Dec. 31, 2012
SSARs / Stock Options [Member]
Dec. 31, 2012
Nonvested Stock Awards [Member]
Sep. 30, 2012
Nonvested Stock Awards [Member]
Dec. 31, 2012
Performance Shares [Member]
Dec. 31, 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 $ 800,000              
Total stock-based compensation included in general and administrative expenses, net of tax 600,000              
Number of shares surrendered by emloyees (shares) 1,306 6,518            
Aggregate value of shares surrendered 34,000 11,000            
Intrinsic value of SSAR/stock options outstanding       1,200,000        
Aggregate intrinsic value of SSARs/stock options vested and expected to vest       1,200,000        
SSARs/stock options weighted average expected life       3 years        
Unrecognized compensation costs related to non-vested stock awards         2,400,000 2,100,000    
Number of shares of performance-based restricted stock issued (shares)             31,532  
Weighted average period to recognize remaining cost         1 year 4 months 24 days      
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)             35.60%  
Expected volatility rate range maximum (percent)             60.40%  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions [Abstract]                
Expected life of options     5 years          
Expected volatility     46.15%          
Expected discrete dividends     0          
Weighted average risk-free interest rate     0.63%       0.34%  
Weighted average fair value     $ 5.39          
Share-based Compensation Arrangement by Share-based Payment Award, Outstanding [Roll Forward]                
Shares outstanding at beginning of period (shares)       429,965        
Granted (shares)       $ 200,000        
Expired (shares)       (1,703)        
Forfeited (shares)       (1,970)        
Shares outstanding at end of period (shares)       581,857        
Exercisable at end of period       301,795        
Vested or expected to vest in the future (shares)       580,353        
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       $ 40.80        
Weighted average exercise price of shares granted       $ 13.33        
Weighted average exercise price of shares expired       $ 104.19        
Weighted average exercise price of shares forfeited       $ 19.08        
Weighted average exercise price of shares outstanding at beginning of period       $ 33.35        
Weighted average exercise price of shares exercisable at end of period       $ 50.33        
Weighted average exercise price of shares vested or expected to vest in the future       $ 33.39        
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)               323,335
Granted (shares)       155,565       92,592
Shares vested (shares)               (31,653)
Shares forfeited (shares)               (3,093)
Shares outstanding at end of period (shares)               381,181
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               $ 19.61
Weighted average grant date fair value of shares granted             $ 5.02 $ 10.26
Weighted average grant date fair value of shares vested in period               $ 10.80
Weighted average grant date fair value of shares forfeited in period               $ 16.19
Weighted average grant date fair value of shares outstanding at end of period               $ 18.10