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Computation of Earnings Per Common Share
 6 Months Ended
Jun. 30, 2023
Earnings Per Share [Abstract]  
Computation of Earnings Per Common Share Computation of Earnings Per Common Share
Basic earnings per common share represents income available to common shareholders divided by the weighted average number of common shares outstanding during the period. Diluted earnings per common share includes additional common shares that would have been outstanding if dilutive potential common shares had been issued. Potential common shares that may be issued relate solely to outstanding shares in the Directors Plan and grant awards under the RSP.
Earnings per common share have been computed based on the following for the:
 Three Months Ended 
 June 30		Six Months Ended 
 June 30
2023202220232022
Average number of common shares outstanding for basic calculation7,498,584 7,545,001 7,528,251 7,539,799 
Average potential effect of common shares in the Directors Plan (1)
38,166 74,936 43,793 79,213 
Average potential effect of common shares in the RSP30,777 30,208 29,569 26,345 
Average number of common shares outstanding used to calculate diluted earnings per common share7,567,527 7,650,145 7,601,613 7,645,357 
Net income$4,630 $5,295 $9,951 $10,029 
Earnings per common share
Basic$0.62 $0.70 $1.32 $1.33 
Diluted$0.61 $0.69 $1.31 $1.31 
(1)Exclusive of shares held in the Rabbi Trust