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Allowance for Loan Losses - Commercial and commercial real estate loan portfolios (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio $ 992,712 $ 972,095
Paycheck Protection Program (PPP)    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 48,098 58,344
Commercial loans secured by owner occupied real estate [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 93,742 95,486
Commercial loans secured by non-owner occupied real estate    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 428,274 400,751
Commercial    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 707,726 705,743
Commercial | Commercial and Industrial Loan [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 137,612 151,162
Commercial | Paycheck Protection Program (PPP)    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 48,098 58,344
Commercial | Commercial loans secured by owner occupied real estate [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 93,742 95,486
Commercial | Commercial loans secured by non-owner occupied real estate    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 428,274 400,751
Commercial | Pass    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 659,634 656,534
Commercial | Pass | Commercial and Industrial Loan [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 122,940 134,186
Commercial | Pass | Paycheck Protection Program (PPP)    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 48,098 58,344
Commercial | Pass | Commercial loans secured by owner occupied real estate [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 91,696 92,189
Commercial | Pass | Commercial loans secured by non-owner occupied real estate    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 396,900 371,815
Commercial | Special Mention    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 39,544 39,856
Commercial | Special Mention | Commercial and Industrial Loan [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 10,826 13,722
Commercial | Special Mention | Commercial loans secured by owner occupied real estate [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 923 2,154
Commercial | Special Mention | Commercial loans secured by non-owner occupied real estate    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 27,795 23,980
Commercial | Substandard [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 6,831 9,345
Commercial | Substandard [Member] | Commercial and Industrial Loan [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 2,136 3,254
Commercial | Substandard [Member] | Commercial loans secured by owner occupied real estate [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 1,123 1,143
Commercial | Substandard [Member] | Commercial loans secured by non-owner occupied real estate    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 3,572 4,948
Commercial | Doubtful [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 1,717 8
Commercial | Doubtful [Member] | Commercial and Industrial Loan [Member]    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 1,710  
Commercial | Doubtful [Member] | Commercial loans secured by non-owner occupied real estate    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio 7 8
Paycheck Protection Program (PPP)    
Loan portfolio summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful within the internal risk rating system    
Loan portfolio $ 48,098 $ 58,344