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LOANS, ALLOWANCE FOR LOAN LOSSES AND IMPAIRED LOANS - TDR Loan Modifications (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2021 USD ($) contract | Mar. 31, 2020 USD ($) contract | Jun. 30, 2020 TDR
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Number of Contracts | 6 | 6 | 0
Pre-Modification Outstanding Recorded Investment | $ 445 | $ 357 |
Post-Modification Outstanding Recorded Investment | 445 | 357 |
Specific Reserve | 0 | 0 |
Maturity Extension |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 110 | 251 |
Modified Payment |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 81 | 0 |
Modified Underwriting |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 254 | 106 |
Other |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | $ 0 | $ 0 |
Commercial/agriculture real estate |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Number of Contracts | contract | 2 | 3 |
Pre-Modification Outstanding Recorded Investment | $ 119 | $ 265 |
Post-Modification Outstanding Recorded Investment | 119 | 265 |
Specific Reserve | 0 | 0 |
Commercial/agriculture real estate | Maturity Extension |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 38 | 248 |
Commercial/agriculture real estate | Modified Payment |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 81 | 0 |
Commercial/agriculture real estate | Modified Underwriting |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 0 | 17 |
Commercial/agriculture real estate | Other |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | $ 0 | $ 0 |
C&I/Agricultural operating |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Number of Contracts | contract | 1 | 0 |
Pre-Modification Outstanding Recorded Investment | $ 240 | $ 0 |
Post-Modification Outstanding Recorded Investment | 240 | 0 |
Specific Reserve | 0 | 0 |
C&I/Agricultural operating | Maturity Extension |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 0 | 0 |
C&I/Agricultural operating | Modified Payment |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 0 | 0 |
C&I/Agricultural operating | Modified Underwriting |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 240 | 0 |
C&I/Agricultural operating | Other |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | $ 0 | $ 0 |
Residential mortgage |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Number of Contracts | contract | 2 | 1 |
Pre-Modification Outstanding Recorded Investment | $ 80 | $ 85 |
Post-Modification Outstanding Recorded Investment | 80 | 85 |
Specific Reserve | 0 | 0 |
Residential mortgage | Maturity Extension |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 66 | 0 |
Residential mortgage | Modified Payment |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 0 | 0 |
Residential mortgage | Modified Underwriting |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 14 | 85 |
Residential mortgage | Other |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | $ 0 | $ 0 |
Consumer installment |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Number of Contracts | contract | 1 | 2 |
Pre-Modification Outstanding Recorded Investment | $ 6 | $ 7 |
Post-Modification Outstanding Recorded Investment | 6 | 7 |
Specific Reserve | 0 | 0 |
Consumer installment | Maturity Extension |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 6 | 3 |
Consumer installment | Modified Payment |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 0 | 0 |
Consumer installment | Modified Underwriting |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | 0 | 4 |
Consumer installment | Other |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Modifications | $ 0 | $ 0 |

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