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FAIR VALUE MEASUREMENTS - Measured on Non-recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018 | Dec. 31, 2017
Assets |  |  |
Other real estate owned | $ 129 | $ 129 | $ 122
Non-recurring | Level 3 |  |  |
Assets |  |  |
Total | 21,759 | 21,759 | 15,073
Total Gains (Losses) | (1,525) | (5,859) |
Non-recurring | Level 3 | Impaired loans |  |  |
Assets |  |  |
Impaired loans | 16,652 | 16,652 | 10,793
Total Gains (Losses) | (1,525) | (5,859) |
Non-recurring | Level 3 | Capitalized servicing rights |  |  |
Assets |  |  |
Capitalized servicing rights | 4,978 | 4,978 | 4,158
Total Gains (Losses) |  |  |
Non-recurring | Level 3 | Other real estate owned |  |  |
Assets |  |  |
Other real estate owned | 129 | 129 | $ 122
Total Gains (Losses) |  |  |

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