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Earnings per share (Tables)
9 Months Ended
Jun. 30, 2012
Notes to Financial Statements  
Earnings per share computations
Earnings per share  THREE MONTHS NINE MONTHS
 (dollars in thousands, except per share amounts) ENDED JUNE 30, ENDED JUNE 30,
  2012 2011 2012 2011
Weighted average common shares        
outstanding during the period        
 - shares used for basic        
earnings per common share 9,382 9,291 9,341 9,279
         
Common shares issuable under        
share based payment plans        
which are potentially dilutive 100 152 117 174
         
Common shares used for diluted        
earnings per common share 9,482 9,443 9,458 9,453
         
Net income $2,684 2,379 6,451 10,457
         
Earnings per common share        
Basic $0.29 0.26 0.69 1.13
Diluted $0.28 0.25 0.68 1.11