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FAIR VALUE MEASUREMENTS - Measured on Non-recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018 | Dec. 31, 2017
Assets |  |  |
Other real estate owned | $ 68 | $ 68 | $ 122
Non-recurring | Level 3 |  |  |
Assets |  |  |
Total | 21,756 | 21,756 | 15,073
Total Gains (Losses) | 120 | (5,762) |
Non-recurring | Level 3 | Impaired loans |  |  |
Assets |  |  |
Impaired loans | 16,540 | 16,540 | 10,793
Total Gains (Losses) | 112 | (5,747) |
Non-recurring | Level 3 | Capitalized servicing rights |  |  |
Assets |  |  |
Capitalized servicing rights | 5,148 | 5,148 | 4,158
Total Gains (Losses) | 0 | 0 |
Non-recurring | Level 3 | Other real estate owned |  |  |
Assets |  |  |
Other real estate owned | 68 | 68 | $ 122
Total Gains (Losses) | $ 8 | $ (15) |

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