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FAIR VALUE MEASUREMENTS - Unobservable Inputs Non-recurring (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Other real estate owned |  | $ 2,236,000
Level 3 | Impaired loans | Discount cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Impaired loans |  | 3,488,000
Non-recurring | Level 3 |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Impaired loans | $ 8,746,000 | 9,625,000
Capitalized servicing rights | 3,605,000 | 4,301,000
Other real estate owned |  | 2,236,000
Carrying value of assets held for sale | 962,000 | 1,764,000
Total | 13,313,000 | 17,926,000
Non-recurring | Level 3 | Fair value of collateral -appraised value |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Impaired loans | 6,128,000 |
Non-recurring | Level 3 | Discount cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Impaired loans | $ 2,618,000 |
Non-recurring | Level 3 | Impaired loans |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Impaired loans |  | $ 6,137,000
Non-recurring | Level 3 | Impaired loans | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Loss severity | 0.00% | 0.00%
Appraised value | $ 0 | $ 0
Cash flows | $ 19,000 | $ 22,000
Discount rate | 3.50% | 2.88%
Non-recurring | Level 3 | Impaired loans | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Loss severity | 70.00% | 0.55%
Appraised value | $ 1,730,000 | $ 6,915,000
Cash flows | $ 953,000 | $ 1,002,000
Discount rate | 9.50% | 9.50%
Non-recurring | Level 3 | Capitalized servicing rights |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Constant prepayment rate (CPR) | 18.53% | 9.95%
Discount rate | 10.05% | 10.07%
Non-recurring | Level 3 | Other real estate owned |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Other real estate owned |  | $ 2,236,000
Appraised value |  | $ 2,695,000
Non-recurring | Level 3 | Other real estate owned | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Selling Costs |  | 10.00%
Non-recurring | Level 3 | Other real estate owned | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Selling Costs |  | 20.00%
Non-recurring | Level 3 | Assets held for sale |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Selling Costs | 6.00% | 6.00%
Non-recurring | Level 3 | Assets held for sale | Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Appraised value | $ 220,000 | $ 136,000
Non-recurring | Level 3 | Assets held for sale | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Appraised value | $ 386,000 | $ 527,000

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