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ALLOWANCE FOR LOAN LOSSES - Additional information (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) item | Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Provision expense for loan losses | $ 250,000 | $ 350,000 | $ 100,000 | $ 400,000 | $ 1,075,000 | $ 675,000 | $ 450,000 | $ 175,000 | $ 1,100,000 | $ 2,375,000 | $ 800,000 |
Non-performing assets as a percent of loans | 0.34% |  |  |  | 0.34% |  |  |  | 0.34% | 0.34% |  |
Allowance for loan losses | $ 12,398,000 |  |  |  | $ 11,345,000 |  |  |  | $ 12,398,000 | $ 11,345,000 | 9,279,000 | $ 8,671,000
Financing Receivable, Individually Evaluated for Impairment | 2,170,000 |  |  |  | 855,000 |  |  |  | 2,170,000 | 855,000 |  |
Provision recovery recorded |  |  |  |  |  |  |  |  | (1,100,000) | (2,375,000) | (800,000) |
Financing Receivable, Recorded Investment, Current | 977,589,000 |  |  |  | 964,256,000 |  |  |  | 977,589,000 | 964,256,000 |  |
Commercial. |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses | 3,071,000 |  |  |  | 3,472,000 |  |  |  | 3,071,000 | 3,472,000 |  |
Financing Receivable, Individually Evaluated for Impairment |  |  |  |  | 847,000 |  |  |  |  | 847,000 |  |
Provision recovery recorded |  |  |  |  |  |  |  |  | 344,000 |  |  |
Commercial loans secured by Non-Owner Occupied real estate |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses | 6,392,000 |  |  |  | 5,373,000 |  |  |  | 6,392,000 | 5,373,000 |  |
Financing Receivable, Individually Evaluated for Impairment |  |  |  |  | 8,000 |  |  |  |  | 8,000 |  |
Provision recovery recorded |  |  |  |  |  |  |  |  | (968,000) |  |  |
Financing Receivable, Recorded Investment, Current | 428,790,000 |  |  |  | 399,850,000 |  |  |  | 428,790,000 | 399,850,000 |  |
Commercial loans secured by Non-Owner Occupied real estate | COVID 19 |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Provision recovery recorded |  |  |  |  |  |  |  |  | (968,000) | (2,200,000) | $ (255,000) |
Commercial and Industrial |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Recorded Investment, Current | 133,918,000 |  |  |  | 148,023,000 |  |  |  | 133,918,000 | 148,023,000 |  |
Pass |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Minimum individual loan balance requiring quarterly review | 2,000,000 |  |  |  |  |  |  |  | 2,000,000 |  |  |
Special Mention |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable Threshold For Individually Evaluating Of Impairment | 250,000 |  |  |  |  |  |  |  | 250,000 |  |  |
Substandard |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable Threshold For Individually Evaluating Of Impairment | 250,000 |  |  |  |  |  |  |  | 250,000 |  |  |
Doubtful |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Minimum individual loan balance requiring quarterly review | 100,000 |  |  |  |  |  |  |  | $ 100,000 |  |  |
Minimum | Commercial. |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Minimum percent of portfolio to be reviewed |  |  |  |  |  |  |  |  | 36.00% |  |  |
Commercial |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Minimum aggregate balances for commercial loan relationship under structure loan rating process | 1,000,000 |  |  |  |  |  |  |  | $ 1,000,000 |  |  |
Commercial | COVID 19 |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of sizable downgrades | item |  |  |  |  |  |  |  |  |  |  | 2 |
Provision recovery recorded |  |  |  |  |  |  |  |  | 344,000 | 372,000 | $ (881,000) |
Commercial | Commercial. |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses | 3,071,000 |  |  |  | 3,472,000 |  |  |  | 3,071,000 | 3,472,000 | 3,951,000 | 3,057,000
Financing Receivable, Individually Evaluated for Impairment | 2,165,000 |  |  |  |  |  |  |  | 2,165,000 |  |  |
Minimum aggregate balances for commercial loan relationship under structure loan rating process | 1,000,000 |  |  |  |  |  |  |  | 1,000,000 |  |  |
Provision recovery recorded |  |  |  |  |  |  |  |  |  | 372,000 | (881,000) |
Commercial | Commercial loans secured by Non-Owner Occupied real estate |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses | 6,392,000 |  |  |  | $ 5,373,000 |  |  |  | 6,392,000 | 5,373,000 | 3,119,000 | $ 3,389,000
Financing Receivable, Individually Evaluated for Impairment | 5,000 |  |  |  |  |  |  |  | 5,000 |  |  |
Provision recovery recorded |  |  |  |  |  |  |  |  |  | $ (2,210,000) | $ 255,000 |
Consumer. | Minimum | Consumer and Residential Mortgage Loans |  |  |  |  |  |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Individually Evaluated for Impairment | $ 150,000 |  |  |  |  |  |  |  | $ 150,000 |  |  |

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