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Allowance for Loan Losses - Commercial and commercial real estate loan portfolios (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
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 | $ 941,780 | $ 882,706
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 | 68,460 |
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 | 90,819 |
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 | 378,858 |
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 | 690,773 | 629,212
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 | 152,636 | 173,922
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 | 68,460 |
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 | 90,819 | 91,655
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 | 378,858 | 363,635
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 | 649,153 | 612,116
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 | 142,948 | 161,147
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 | 68,460 |
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 | 87,844 | 88,942
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 | 349,901 | 362,027
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 | 35,697 | 2,237
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 | 6,336 | 853
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 | 1,889 | 1,384
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 | 27,472 |
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 | 5,915 | 14,851
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 | 3,352 | 11,922
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 | 1,086 | 1,329
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 | 1,477 | 1,600
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 | 8 | 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 |  | 0
Commercial | Doubtful [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 |  | 0
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 | $ 8 | $ 8

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524 + Details
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