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Earnings Per Share (Tables)
12 Months Ended
Sep. 30, 2012
Earnings Per Share [Abstract]  
Earnings per share computations
Earnings per share  Years Ended September 30
(Dollars in thousands, except per share amounts)  2012  2011  2010
Common shares:               
                
Weighted average common shares               
 outstanding during the period -               
 shares used for basic earnings               
 per common share   9,360    9,284    9,182 
                
Common shares issuable under share               
 based payment plans which are               
 potentially dilutive   114    167    242 
                
Common shares used for diluted               
 earnings per common share   9,474    9,451    9,424 
                
Net income  $7,808    12,211    7,371 
                
Earnings per common share               
 Basic  $0.83    1.32    0.80 
 Diluted  $0.82    1.29    0.78