INVESTMENTS - Available-for-sale securities reconciliation (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	$ 275,680		$ 272,051
Unrealized Gains	116		3,433
Unrealized Losses	(47,854)		(4,125)
Securities available-for-sale, at fair value	227,942		271,359
SECURITIES HELD-TO-MATURITY
Amortized cost	8,500		7,500
Unrealized gains			628
Unrealized losses	(550)
Securities held-to-maturity, at fair value	7,950		8,128
Allowance for credit losses	(31)		0
Total securities
Amortized cost	284,180		279,551
Unrealized gains	116		4,061
Unrealized losses	(48,404)		(4,125)
Total securities, at fair value	235,892		279,487
Allowance for credit losses	(31)
U.S. agency securities
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	21,153		21,155
Unrealized Gains	80		133
Unrealized Losses	(3,096)		(318)
Securities available-for-sale, at fair value	18,137		20,970
Corporate securities
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	9,497		9,495
Unrealized Gains	28		31
Unrealized Losses	(909)		(524)
Securities available-for-sale, at fair value	8,616		9,002
SECURITIES HELD-TO-MATURITY
Amortized cost	8,500		7,500
Unrealized gains			628
Unrealized losses	(550)
Securities held-to-maturity, at fair value	7,950		8,128
Allowance for credit losses	(31)	$ (31)
Municipal bonds
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	145,918		136,377
Unrealized Gains	2		1,577
Unrealized Losses	(29,276)		(2,521)
Securities available-for-sale, at fair value	116,644		135,433
Mortgage-backed securities
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	84,192		88,641
Unrealized Gains			1,457
Unrealized Losses	(13,115)		(696)
Securities available-for-sale, at fair value	71,077		89,402
U.S. Small Business Administration securities
SECURITIES AVAILABLE-FOR-SALE
Amortized cost	14,920		16,383
Unrealized Gains	6		235
Unrealized Losses	(1,458)		(66)
Securities available-for-sale, at fair value	$ 13,468		$ 16,552