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FAIR VALUE MEASUREMENTS AND FAIR VALUES OF FINANCIAL INSTRUMENTS - Level 3 Reconciliation (Details) - Level 3 - Servicing rights - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Reconciliation of activity for Level 3 assets (servicing rights) measured at fair value on a recurring basis
Servicing rights balance, beginning of period	$ 1,956	$ 1,226	$ 1,689	$ 1,277
Originations of servicing rights	199	328	391	403
Unrealized (loss) gain included in earnings	(39)	(270)	36	(396)
Servicing rights balance, end of period	$ 2,116	$ 1,284	$ 2,116	$ 1,284

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