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FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Reconciliation (Details) - Level 3 - Servicing rights. - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Reconciliation of activity for Level 3 assets (servicing rights) measured at fair value on a recurring basis |  |
Servicing rights balance, beginning of period | $ 1,689 | $ 1,277
Originations of servicing rights | 708 | 988
Unrealized (loss) gain included in earnings | (68) | (576)
Servicing rights balance, end of period | $ 2,329 | $ 1,689

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