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DEBT SECURITIES - Amortized cost and fair value of securities held-to-maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Jun. 30, 2026	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	$ 142,041		$ 95,044
Gross Unrecognized Gains	44		329
Gross Unrecognized Losses	(7,503)		(4,738)
Fair Value	134,582		90,635
Allowance for Credit Losses	(189)		(74)
US Treasury Securities
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	249		248
Gross Unrecognized Gains	0		1
Gross Unrecognized Losses	(2)		0
Fair Value	247		249
Allowance for Credit Losses	0		0
US Government-sponsored Enterprises Debt Securities
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	3,126		3,412
Gross Unrecognized Gains	2		3
Gross Unrecognized Losses	(258)		(131)
Fair Value	2,870		3,284
Allowance for Credit Losses	0		0
Municipals
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	3,159
Gross Unrecognized Gains	0
Gross Unrecognized Losses	(138)
Fair Value	3,021
Allowance for Credit Losses	0
Residential mortgage-backed securities issued by U.S. government agencies and sponsored enterprises \| Residential Portfolio Segment
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	66,176		59,839
Gross Unrecognized Gains	42		209
Gross Unrecognized Losses	(4,479)		(3,005)
Fair Value	61,739		57,043
Allowance for Credit Losses	0		0
Residential mortgage-backed securities issued by U.S. government agencies and sponsored enterprises \| Commercial Portfolio Segment
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	5,463		6,138
Gross Unrecognized Gains	0		0
Gross Unrecognized Losses	(15)		(8)
Fair Value	5,448		6,130
Allowance for Credit Losses	0		0
Residential Mortgage Back Securities - Other
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	674		751
Gross Unrecognized Gains	0		0
Gross Unrecognized Losses	(47)		(47)
Fair Value	627		704
Allowance for Credit Losses	0		0
Corporate bonds
Debt Securities, Held-to-Maturity, Maturity [Abstract]
Amortized Cost	63,194		24,656
Gross Unrecognized Gains	0		116
Gross Unrecognized Losses	(2,564)		(1,547)
Fair Value	60,630		23,225
Allowance for Credit Losses	$ (189)	$ (151)	$ (74)	$ (71)	$ (71)	$ (71)