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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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 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	$ 2,116	$ 1,284	$ 1,689	$ 1,277
Originations of servicing rights	176	374	567	777
Unrealized (loss) gain included in earnings	(45)	(221)	(9)	(617)
Servicing rights balance, end of period	$ 2,247	$ 1,437	$ 2,247	$ 1,437

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