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Computation of Earnings Per Common Share (Tables)
6 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Computation of earnings per common share
Earnings per common share have been computed based on the following for the:
 Three Months Ended 
 June 30
Six Months Ended 
 June 30
2021202020212020
Average number of common shares outstanding for basic calculation7,944,455 7,924,318 7,956,889 7,927,298 
Average potential effect of common shares in the Directors Plan (1)
102,452 144,430 108,385 154,177 
Average potential effect of common shares in the RSP16,257 — 10,489 — 
Average number of common shares outstanding used to calculate diluted earnings per common share8,063,164 8,068,748 8,075,763 8,081,475 
Net income$4,621 $4,187 $10,019 $7,251 
Earnings per common share
Basic$0.58 $0.53 $1.26 $0.91 
Diluted$0.57 $0.52 $1.24 $0.90 
(1)Exclusive of shares held in the Rabbi Trust