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FAIR VALUE MEASUREMENTS - Unobservable Inputs Non-recurring (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Other real estate owned | $ 1,983 | $ 2,236
Non-recurring | Level 3 |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Impaired loans | 9,617 | 9,625
Capitalized servicing rights | 3,234 | 4,301
Other real estate owned | 1,983 | 2,236
Carrying value of assets held for sale | 1,764 | 1,764
Total | 16,598 | 17,926
Non-recurring | Level 3 | Fair value of collateral -appraised value |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Impaired loans | 7,071 | 6,137
Non-recurring | Level 3 | Discount cash flow |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Impaired loans | $ 2,546 | $ 3,488
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 | $ 21 | $ 22
Discount rate | 3.50% | 2.88%
Non-recurring | Level 3 | Impaired loans | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Loss severity | 53.00% | 55.00%
Appraised value | $ 1,730 | $ 6,915
Cash flows | $ 1,002 | $ 1,002
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) | 16.73% | 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} |  |
Appraised value | $ 2,000 | $ 2,695
Selling Costs | 6.00% |
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} |  |
Carrying value of assets held for sale | $ 1,764 | $ 1,764
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 | $ 136 | $ 136
Non-recurring | Level 3 | Assets held for sale | Maximum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items} |  |
Appraised value | $ 527 | $ 527

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