INVESTMENT SECURITIES - Amortized Cost and Fair Values of AFS Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 973,220	$ 972,138
Gross Unrealized Gains	4,995	7,948
(Gross Unrealized Losses)	31,197	27,346
Allowance for Credit Losses	0	0
Fair Value	947,018	952,740
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	15,014	15,016
Gross Unrealized Gains	0	0
(Gross Unrealized Losses)	817	805
Allowance for Credit Losses	0	0
Fair Value	14,197	14,211
U.S. Government Agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,613	1,746
Gross Unrealized Gains	46	50
(Gross Unrealized Losses)	0	0
Allowance for Credit Losses	0	0
Fair Value	1,659	1,796
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	219,408	218,832
Gross Unrealized Gains	162	288
(Gross Unrealized Losses)	19,222	16,972
Allowance for Credit Losses	0	0
Fair Value	200,348	202,148
GSE residential MBSs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	239,118	234,016
Gross Unrealized Gains	2,051	3,228
(Gross Unrealized Losses)	4,168	3,141
Allowance for Credit Losses	0	0
Fair Value	237,001	234,103
GSE commercial MBSs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,691	6,081
Gross Unrealized Gains	84	106
(Gross Unrealized Losses)	22	16
Allowance for Credit Losses	0	0
Fair Value	5,753	6,171
GSE residential CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	348,774	354,954
Gross Unrealized Gains	2,254	3,425
(Gross Unrealized Losses)	4,952	4,376
Allowance for Credit Losses	0	0
Fair Value	346,076	354,003
Non-agency CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	65,215	60,693
Gross Unrealized Gains	76	363
(Gross Unrealized Losses)	1,258	1,233
Allowance for Credit Losses	0	0
Fair Value	64,033	59,823
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	76,197	78,610
Gross Unrealized Gains	289	443
(Gross Unrealized Losses)	758	803
Allowance for Credit Losses	0	0
Fair Value	75,728	78,250
Corporate debt
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,950	1,947
Gross Unrealized Gains	33	45
(Gross Unrealized Losses)	0	0
Allowance for Credit Losses	0	0
Fair Value	1,983	1,992
Other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	240	243
Gross Unrealized Gains	0	0
(Gross Unrealized Losses)	0	0
Allowance for Credit Losses	0	0
Fair Value	$ 240	$ 243