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LOANS - Payment Defaults on TDR Loans (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) loan | Dec. 31, 2019 USD ($)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 1 | 11
Troubled debt restructurings, recorded investment | $ 240 | $ 530
Residential mortgage | Real estate loan | first liens |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 1
Troubled debt restructurings, recorded investment | $ 0 | $ 261
Residential mortgage | Real estate loan | junior liens |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 1 | 1
Troubled debt restructurings, recorded investment | $ 240 | $ 18
Commercial | Real estate loan |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | loan | 1 |
Commercial | Commercial and industrial |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 8
Troubled debt restructurings, recorded investment | $ 0 | $ 170
Commercial | Agricultural loans |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | 1
Troubled debt restructurings, recorded investment | $ 0 | $ 81

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