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Loans and Allowance for Loan Losses, Allowance for Loan Losses by Portfolio Segment (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward]                      
Beginning balance       $ 6,272       $ 6,728 $ 6,272 $ 6,728 $ 7,499
Provision for loan losses $ (471) $ (2) $ (393) 3,846 $ (1,015) $ 444 $ (806) 2,377 2,980 1,000 1,039
Loans charged off                 (3,033) (5,092) (3,600)
Recoveries                 941 3,636 1,790
Ending balance 7,160       6,272       7,160 6,272 6,728
Residential Real Estate [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Beginning balance       1,250       1,583 1,250 1,583 1,470
Provision for loan losses                 413 98 772
Loans charged off                 (340) (1,060) (874)
Recoveries                 157 629 215
Ending balance 1,480       1,250       1,480 1,250 1,583
Commercial Real Estate [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Beginning balance       1,928       2,186 1,928 2,186 2,978
Provision for loan losses                 946 (1,745) (1,311)
Loans charged off                 (559) (602) (4)
Recoveries                 116 2,089 523
Ending balance 2,431       1,928       2,431 1,928 2,186
Commercial and Industrial [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Beginning balance       1,447       1,063 1,447 1,063 1,024
Provision for loan losses                 443 1,807 (80)
Loans charged off                 (185) (1,513) (208)
Recoveries                 71 90 327
Ending balance 1,776       1,447       1,776 1,447 1,063
Consumer [Member]                      
Allowance for Loan and Lease Losses [Roll Forward]                      
Beginning balance       $ 1,647       $ 1,896 1,647 1,896 2,027
Provision for loan losses                 1,178 840 1,658
Loans charged off                 (1,949) (1,917) (2,514)
Recoveries                 597 828 725
Ending balance $ 1,473       $ 1,647       $ 1,473 $ 1,647 $ 1,896