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Earnings Per Common Share
 12 Months Ended
Dec. 31, 2020
Earnings Per Share [Abstract]  
Earnings Per Common Share Earnings Per Common Share 
The calculations of basic and diluted earnings per common share for the years ended December 31 were as follows:
(Dollars in thousands, except per common share data)202020192018
Distributed earnings allocated to common shareholders$27,082 $26,503 $21,334 
Undistributed earnings allocated to common shareholders7,313 26,796 24,660 
Net earnings allocated to common shareholders$34,395 $53,299 $45,994 
Weighted-average common shares outstanding19,721,772 20,120,119 18,991,768 
Effect of potentially dilutive common shares122,034 153,606 130,492 
Total weighted-average diluted common shares outstanding19,843,806 20,273,725 19,122,260 
Earnings per common share:
Basic$1.74 $2.65 $2.42 
Diluted$1.73 $2.63 $2.41 
Anti-dilutive common shares excluded from calculation:
Restricted shares, stock options and stock appreciation rights64,145 — 1,748