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Computation of Earnings Per Common Share
12 Months Ended
Dec. 31, 2019
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, see "Note 13 – Benefit Plans."
Earnings per common share have been computed based on the following for the years ended December 31:

2019
 
2018
 
2017
Average number of common shares outstanding for basic calculation
7,909,794

 
7,872,077

 
7,841,451

Average potential effect of common shares in the Directors Plan (1)
185,248

 
200,771

 
192,286

Average number of common shares outstanding used to calculate diluted earnings per common share
8,095,042

 
8,072,848

 
8,033,737

Net income
$
13,024

 
$
14,021

 
$
13,237

Earnings per common share
 
 
 
 
 
Basic
$
1.65

 
$
1.78

 
$
1.69

Diluted
$
1.61

 
$
1.74

 
$
1.65

(1) Exclusive of shares held in the Rabbi Trust