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Loans and Allowance for Loan Losses, Allowance for Loans Losses and Recorded Investment in Loans by Portfolio Segment Based on Impairment Method (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Ending allowance balance attributable to loans [Abstract]        
Individually evaluated for impairment $ 0 $ 807    
Collectively evaluated for impairment 7,160 5,465    
Total ending allowance balance 7,160 6,272 $ 6,728 $ 7,499
Loans [Abstract]        
Loans individually evaluated for impairment 11,026 17,135    
Loans collectively evaluated for impairment 837,638 755,639    
Total ending loans balance 848,664 772,774    
Residential Real Estate [Member]        
Ending allowance balance attributable to loans [Abstract]        
Individually evaluated for impairment 0 0    
Collectively evaluated for impairment 1,480 1,250    
Total ending allowance balance 1,480 1,250 1,583 1,470
Loans [Abstract]        
Loans individually evaluated for impairment 411 438    
Loans collectively evaluated for impairment 305,067 309,815    
Total ending loans balance 305,478 310,253    
Commercial Real Estate [Member]        
Ending allowance balance attributable to loans [Abstract]        
Individually evaluated for impairment 0 385    
Collectively evaluated for impairment 2,431 1,543    
Total ending allowance balance 2,431 1,928 2,186 2,978
Loans [Abstract]        
Loans individually evaluated for impairment 5,845 11,300    
Loans collectively evaluated for impairment 247,604 210,836    
Total ending loans balance 253,449 222,136    
Commercial and Industrial [Member]        
Ending allowance balance attributable to loans [Abstract]        
Individually evaluated for impairment 0 303    
Collectively evaluated for impairment 1,776 1,144    
Total ending allowance balance 1,776 1,447 1,063 1,024
Loans [Abstract]        
Loans individually evaluated for impairment 4,686 4,910    
Loans collectively evaluated for impairment 153,006 95,113    
Total ending loans balance 157,692 100,023    
Consumer [Member]        
Ending allowance balance attributable to loans [Abstract]        
Individually evaluated for impairment 0 119    
Collectively evaluated for impairment 1,473 1,528    
Total ending allowance balance 1,473 1,647 $ 1,896 $ 2,027
Loans [Abstract]        
Loans individually evaluated for impairment 84 487    
Loans collectively evaluated for impairment 131,961 139,875    
Total ending loans balance $ 132,045 $ 140,362