SECURITIES - Summary of available-for-sale securities with unrealized losses (Details) $ in Thousands	Jun. 30, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	$ (868)	$ (14,459)
Estimated Fair Value	13,915	172,191
Unrealized Losses	(35,138)	(21,777)
Estimated Fair Value	$ 268,358	$ 130,720
Number of Securities | security	105	105
Unrealized Losses	$ (36,006)	$ (36,236)
Estimated Fair Value	282,273	302,911
U.S. Treasury Note
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	0	(1,342)
Estimated Fair Value	0	28,670
Unrealized Losses	(2,826)	(1,836)
Estimated Fair Value	$ 44,110	$ 15,089
Number of Securities | security	5	5
Unrealized Losses	$ (2,826)	$ (3,178)
Estimated Fair Value	44,110	43,759
Corporate Bonds
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	(844)	(3,608)
Estimated Fair Value	7,156	58,509
Unrealized Losses	(5,802)	(1,823)
Estimated Fair Value	$ 53,144	$ 15,522
Number of Securities | security	27	31
Unrealized Losses	$ (6,646)	$ (5,431)
Estimated Fair Value	60,300	74,031
U.S. Government agency obligations
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	(5)	(5)
Estimated Fair Value	634	696
Unrealized Losses	(859)	(939)
Estimated Fair Value	$ 14,063	$ 14,727
Number of Securities | security	4	5
Unrealized Losses	$ (864)	$ (944)
Estimated Fair Value	14,697	15,423
Obligations issued by U.S. states and their political subdivisions
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	(18)	(65)
Estimated Fair Value	6,074	5,641
Unrealized Losses	(340)	(275)
Estimated Fair Value	$ 6,116	$ 1,568
Number of Securities | security	13	8
Unrealized Losses	$ (358)	$ (340)
Estimated Fair Value	12,190	7,209
Residential one-to-four family
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	(1)	(8,273)
Estimated Fair Value	51	60,986
Unrealized Losses	(23,868)	(16,384)
Estimated Fair Value	$ 133,535	$ 79,189
Number of Securities | security	48	49
Unrealized Losses	$ (23,869)	$ (24,657)
Estimated Fair Value	133,586	140,175
Multifamily
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	0	(1,166)
Estimated Fair Value	0	17,689
Unrealized Losses	(1,138)	(151)
Estimated Fair Value	$ 13,171	$ 469
Number of Securities | security	6	5
Unrealized Losses	$ (1,138)	$ (1,317)
Estimated Fair Value	13,171	18,158
Asset-backed securities
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items]
Unrealized Losses	0	0
Estimated Fair Value	0	0
Unrealized Losses	(305)	(369)
Estimated Fair Value	$ 4,219	$ 4,156
Number of Securities | security	2	2
Unrealized Losses	$ (305)	$ (369)
Estimated Fair Value	$ 4,219	$ 4,156