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ALLOWANCE FOR LOAN LOSSES - Commercial and commercial real estate loan portfolios (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
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 | $ 882,706 | $ 862,282
Commercial Portfolio Segment [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 | 629,212 | 606,727
Commercial and Industrial [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 | 173,922 | 158,279
Commercial and Industrial [Member] | Commercial Portfolio Segment [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 | 173,922 | 158,279
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 | 91,655 | 91,905
Commercial loans secured by owner occupied real estate [Member] | Commercial Portfolio Segment [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 | 91,655 | 91,905
Commercial loans secured by non-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 | 363,635 | 356,543
Commercial loans secured by non-owner occupied real estate [Member] | Commercial Portfolio Segment [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 | 363,635 | 356,543
Pass [Member] | Commercial Portfolio Segment [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 | 612,116 | 591,461
Pass [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [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 | 161,147 | 154,510
Pass [Member] | Commercial loans secured by owner occupied real estate [Member] | Commercial Portfolio Segment [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 | 88,942 | 86,997
Pass [Member] | Commercial loans secured by non-owner occupied real estate [Member] | Commercial Portfolio Segment [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 | 362,027 | 349,954
Special Mention [Member] | Commercial Portfolio Segment [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 | 2,237 | 12,174
Special Mention [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [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 | 853 | 2,089
Special Mention [Member] | Commercial loans secured by owner occupied real estate [Member] | Commercial Portfolio Segment [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 | 1,384 | 3,769
Special Mention [Member] | Commercial loans secured by non-owner occupied real estate [Member] | Commercial Portfolio Segment [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 |  | 6,316
Substandard [Member] | Commercial Portfolio Segment [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 | 14,851 | 3,081
Substandard [Member] | Commercial and Industrial [Member] | Commercial Portfolio Segment [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 | 11,922 | 1,680
Substandard [Member] | Commercial loans secured by owner occupied real estate [Member] | Commercial Portfolio Segment [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 | 1,329 | 1,139
Substandard [Member] | Commercial loans secured by non-owner occupied real estate [Member] | Commercial Portfolio Segment [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 | 1,600 | 262
Doubtful [Member] | Commercial Portfolio Segment [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 | 8 | 11
Doubtful [Member] | Commercial loans secured by non-owner occupied real estate [Member] | Commercial Portfolio Segment [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 | $ 8 | $ 11

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