Quarterly report pursuant to sections 13 or 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Stockholders' Equity [Abstract]    
Number of shares authorized to be repurchased 350,000  
Shares    
Balance September 30, 2012 23,235  
Purchases 38,547  
Issuances (5,673)  
Balance December 31, 2012 56,109  
Cost    
Balance September 30, 2012 $ 543  
Purchases 1,411  
Issuances (138)  
Balance December 31, 2012 1,816  
Remaining number of shares available for repurchase 221,875  
Stock-based compensation expense $ 141 $ 113