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LOANS - TDR, Recorded Investment and Number of Modifications (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 USD ($) item | Sep. 30, 2019 USD ($) item | Sep. 30, 2020 USD ($) item | Sep. 30, 2019 USD ($) item | Dec. 31, 2019 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Borrower's sustained repayment performance period |  |  |  |  | 6 months
Number of Modifications | item | 1 | 7 | 7 | 25 |
Pre-Modification Outstanding Recorded Investment | $ 86 | $ 808 | $ 216 | $ 1,985 |
Post-Modification Outstanding Recorded Investment | 86 | $ 750 | $ 528 | $ 1,795 |
Number of modifications which subsequently defaulted | item |  |  | 0 |  |
Total loans | $ 2,708,691 |  | $ 2,708,691 |  | $ 2,641,092
Interest only payments |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  | 2 | 0 | 2 |
Post-Modification Outstanding Recorded Investment |  | $ 90 | $ 0 | $ 90 |
Interest only payments and maturity concession |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  |  | 0 | 2 |
Post-Modification Outstanding Recorded Investment |  |  | $ 0 | $ 73 |
Interest rate, forbearance and maturity concession |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  |  | 4 | 0 |
Post-Modification Outstanding Recorded Investment |  |  | $ 409 | $ 0 |
Amortization and maturity concession |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  |  | 0 | 4 |
Post-Modification Outstanding Recorded Investment |  |  | $ 0 | $ 273 |
Amortization, interest rate and maturity concession |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  |  | 0 | 1 |
Post-Modification Outstanding Recorded Investment |  |  | $ 0 | $ 77 |
Forbearance |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  | 1 | 0 | 3 |
Post-Modification Outstanding Recorded Investment |  | $ 141 | $ 0 | $ 253 |
Forbearance and interest only payments |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  | 2 | 1 | 5 |
Post-Modification Outstanding Recorded Investment |  | $ 176 | $ 24 | $ 331 |
Forbearance, amortization and maturity concession |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  | 2 | 0 | 7 |
Post-Modification Outstanding Recorded Investment |  | $ 343 | $ 0 | $ 640 |
Maturity concession |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item | 1 |  | 2 | 0 |
Post-Modification Outstanding Recorded Investment | $ 86 |  | $ 95 | $ 0 |
Other |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  |  | 0 | 1 |
Post-Modification Outstanding Recorded Investment |  |  | $ 0 | $ 58 |
Modifications in response to COVID-19 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 78,700 |  | $ 78,700 |  |
Other commercial real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  | 4 | 1 | 9 |
Pre-Modification Outstanding Recorded Investment |  | $ 268 | $ 54 | $ 543 |
Post-Modification Outstanding Recorded Investment |  | $ 267 | $ 247 | $ 529 |
Commercial |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  |  | 3 | 4 |
Pre-Modification Outstanding Recorded Investment |  |  | $ 41 | $ 168 |
Post-Modification Outstanding Recorded Investment |  |  | $ 162 | $ 91 |
Commercial | Modifications in response to COVID-19 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of financing receivables not treated as TDR | item |  |  | 588 |  |
Amount of financing receivable not treated as TDR | 375,000 |  | $ 375,000 |  |
Total loans | $ 74,100 |  | $ 74,100 |  |
Number of deferred financial receivables outstanding | item | 110 |  | 110 |  |
Agricultural |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item | 1 | 1 | 1 | 1 |
Pre-Modification Outstanding Recorded Investment | $ 86 | $ 141 | $ 86 | $ 141 |
Post-Modification Outstanding Recorded Investment | 86 | $ 141 | $ 86 | $ 141 |
Residential mortgages |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  | 2 |  | 11 |
Pre-Modification Outstanding Recorded Investment |  | $ 399 |  | $ 1,133 |
Post-Modification Outstanding Recorded Investment |  | $ 342 |  | $ 1,034 |
Residential mortgages | Modifications in response to COVID-19 |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of financing receivables not treated as TDR | item |  |  | 564 |  |
Amount of financing receivable not treated as TDR | 98,500 |  | $ 98,500 |  |
Total loans | $ 4,600 |  | $ 4,600 |  |
Number of deferred financial receivables outstanding | item | 86 |  | 86 |  |
Home equity |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  |  | 1 |  |
Pre-Modification Outstanding Recorded Investment |  |  | $ 26 |  |
Post-Modification Outstanding Recorded Investment |  |  | $ 24 |  |
Other consumer |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Number of Modifications | item |  |  | 1 |  |
Pre-Modification Outstanding Recorded Investment |  |  | $ 9 |  |
Post-Modification Outstanding Recorded Investment |  |  | 9 |  |
Total commercial real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | $ 1,045,635 |  | 1,045,635 |  | 930,661
Total commercial real estate | Construction and land development |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 89,118 |  | 89,118 |  | 34,290
Total commercial real estate | Other commercial real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 956,517 |  | 956,517 |  | 896,371
Commercial and industrial |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 522,510 |  | 522,510 |  | 423,291
Commercial and industrial | Commercial |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 438,370 |  | 438,370 |  | 298,764
Commercial and industrial | Agricultural |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 17,814 |  | 17,814 |  | 20,224
Commercial and industrial | Tax exempt |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 66,326 |  | 66,326 |  | 104,303
Total residential real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 1,021,206 |  | 1,021,206 |  | 1,151,857
Fair value of bank-owned residential real estate property | 1,900 |  | 1,900 |  | 1,900
Total residential real estate | Residential mortgages |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 1,021,206 |  | 1,021,206 |  | 1,151,857
Residential mortgage loans collateralized by real estate property in the process of foreclosure |  |  | 917 |  | 810
Total consumer |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 119,340 |  | 119,340 |  | 135,283
Total consumer | Home equity |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | 108,874 |  | 108,874 |  | 122,401
Total consumer | Other consumer |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total loans | $ 10,466 |  | $ 10,466 |  | $ 12,882

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