SECURITIES - Summary of available-for-sale securities with unrealized losses (Details) $ in Thousands	Sep. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	$ (12)	$ (28)
Estimated Fair Value	17,114	13,253
Unrealized Losses	(23,754)	(30,727)
Estimated Fair Value	$ 209,315	$ 258,290
Number of Securities | security	83	99
Unrealized Losses	$ (23,766)	$ (30,755)
Estimated Fair Value	226,429	271,543
U.S. Treasury notes
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	0	0
Estimated Fair Value	0	0
Unrealized Losses	(1,067)	(1,875)
Estimated Fair Value	$ 25,867	$ 35,060
Number of Securities | security	3	4
Unrealized Losses	$ (1,067)	$ (1,875)
Estimated Fair Value	25,867	35,060
Corporate bonds
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	(9)	(7)
Estimated Fair Value	9,994	8,260
Unrealized Losses	(3,666)	(5,674)
Estimated Fair Value	$ 43,022	$ 61,156
Number of Securities | security	23	30
Unrealized Losses	$ (3,675)	$ (5,681)
Estimated Fair Value	53,016	69,416
U.S. Government agency obligations
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	0	0
Estimated Fair Value	0	0
Unrealized Losses	(85)	(380)
Estimated Fair Value	$ 1,040	$ 11,140
Number of Securities | security	2	3
Unrealized Losses	$ (85)	$ (380)
Estimated Fair Value	1,040	11,140
Obligations issued by U.S. states and their political subdivisions
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	0	0
Estimated Fair Value	0	0
Unrealized Losses	(243)	(228)
Estimated Fair Value	$ 6,130	$ 6,195
Number of Securities | security	5	5
Unrealized Losses	$ (243)	$ (228)
Estimated Fair Value	6,130	6,195
Residential
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	0	0
Estimated Fair Value	0	2
Unrealized Losses	(17,879)	(21,266)
Estimated Fair Value	$ 120,805	$ 128,535
Number of Securities | security	42	48
Unrealized Losses	$ (17,879)	$ (21,266)
Estimated Fair Value	120,805	128,537
Multifamily
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	(3)	0
Estimated Fair Value	2,120	0
Unrealized Losses	(623)	(999)
Estimated Fair Value	$ 8,209	$ 11,524
Number of Securities | security	5	6
Unrealized Losses	$ (626)	$ (999)
Estimated Fair Value	10,329	11,524
Asset-backed securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	0	(21)
Estimated Fair Value	5,000	4,991
Unrealized Losses	(191)	(305)
Estimated Fair Value	$ 4,242	$ 4,680
Number of Securities | security	3	3
Unrealized Losses	$ (191)	$ (326)
Estimated Fair Value	$ 9,242	$ 9,671