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LOANS AND ALLOWANCE FOR CREDIT LOSSES - TDR, Recorded Investment and Number of Modifications (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($) loan | Dec. 31, 2019 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Borrower's sustained repayment performance period | 6 months |  |
Number of Modifications | 0 | 10 | 31
Pre-Modification Outstanding Recorded Investment |  | $ 404,000 | $ 2,923,000
Post-Modification Outstanding Recorded Investment |  | 601,000 | 2,630,000
Reserve |  | $ 24,000 | $ 69,000
Number of modifications which subsequently defaulted | loan | 0 |  |
Interest only payments and maturity concession |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  |  | 2
Post-Modification Outstanding Recorded Investment |  |  | $ 73,000
Interest rate, forbearance and maturity concession |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  | 4 |
Post-Modification Outstanding Recorded Investment |  | $ 384,000 |
Amortization and maturity concession |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  |  | 4
Post-Modification Outstanding Recorded Investment |  |  | $ 273,000
Amortization, interest rate and maturity concession |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  |  | 5
Post-Modification Outstanding Recorded Investment |  |  | $ 539,000
Forbearance |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  |  | 5
Post-Modification Outstanding Recorded Investment |  |  | $ 346,000
Forbearance and interest only payments |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  | 1 | 7
Post-Modification Outstanding Recorded Investment |  | $ 24,000 | $ 692,000
Forbearance and maturity concession |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  |  | 4
Post-Modification Outstanding Recorded Investment |  |  | $ 472,000
Maturity concession |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  | 5 |
Post-Modification Outstanding Recorded Investment |  | $ 193,000 |
Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  |  | 4
Post-Modification Outstanding Recorded Investment |  |  | $ 235,000
Home equity |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  | 1 |
Pre-Modification Outstanding Recorded Investment |  | $ 26,000 |
Post-Modification Outstanding Recorded Investment |  | $ 24,000 |
Total commercial real estate | Commercial real estate non-owner occupied |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  | 1 | 10
Pre-Modification Outstanding Recorded Investment |  | $ 54,000 | $ 630,000
Post-Modification Outstanding Recorded Investment |  | 244,000 | 529,000
Reserve |  | $ 24,000 | $ 69,000
Total commercial and industrial | Commercial and industrial |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  | 7 | 9
Pre-Modification Outstanding Recorded Investment |  | $ 315,000 | $ 866,000
Post-Modification Outstanding Recorded Investment |  | 325,000 | $ 774,000
Total residential real estate | Residential mortgages |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  |  | 12
Pre-Modification Outstanding Recorded Investment |  |  | $ 1,427,000
Post-Modification Outstanding Recorded Investment |  |  | $ 1,327,000
Residential mortgage loans collateralized by real estate property in the process of foreclosure | $ 574,000 | $ 633,000 |
Total consumer | Other consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Number of Modifications | loan |  | 1 |
Pre-Modification Outstanding Recorded Investment |  | $ 9,000 |
Post-Modification Outstanding Recorded Investment |  | $ 8,000 |

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- Definition Represents the reasonable period of a borrower's sustained repayment performance for consideration of returning the loan to performing status. + References No definition available. + Details
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