SECURITIES - Amortized Cost and Fair Values of Securities with Gross Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Available-for-sale:
Amortized Cost	$ 1,061,253	$ 841,867
Gross Unrealized Gains	3,188	4,667
Gross Unrealized Losses	(38,449)	(33,433)
Allowance for Credit Losses	0	0
Total	1,025,992	813,101
Held-to-maturity:
Amortized Cost	453,850	458,746
Gross Unrecognized Gains	208	401
Gross Unrecognized Losses	(33,534)	(32,348)
Total	420,524	426,799
Allowance for Credit Losses	0	0
U.S. Treasury
Available-for-sale:
Amortized Cost	79,825	89,796
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4,277)	(4,252)
Allowance for Credit Losses	0	0
Total	75,548	85,544
U.S. government agency
Available-for-sale:
Amortized Cost	110,402	42,399
Gross Unrealized Gains	187	146
Gross Unrealized Losses	(1,478)	(1,123)
Allowance for Credit Losses	0	0
Total	109,111	41,422
Held-to-maturity:
Amortized Cost	88,501	88,496
Gross Unrecognized Gains	0	0
Gross Unrecognized Losses	(5,292)	(4,850)
Total	83,209	83,646
Allowance for Credit Losses	0	0
Municipal
Available-for-sale:
Amortized Cost	208,692	152,144
Gross Unrealized Gains	119	188
Gross Unrealized Losses	(14,618)	(12,062)
Allowance for Credit Losses	0	0
Total	194,193	140,270
Held-to-maturity:
Amortized Cost	28,205	28,214
Gross Unrecognized Gains	186	353
Gross Unrecognized Losses	(90)	(58)
Total	28,301	28,509
Allowance for Credit Losses	0	0
Agency residential
Available-for-sale:
Amortized Cost	453,858	364,567
Gross Unrealized Gains	1,959	3,605
Gross Unrealized Losses	(9,988)	(7,377)
Allowance for Credit Losses	0	0
Total	445,829	360,795
Held-to-maturity:
Amortized Cost	73,534	75,536
Gross Unrecognized Gains	6	23
Gross Unrecognized Losses	(3,018)	(2,544)
Total	70,522	73,015
Allowance for Credit Losses	0	0
Agency commercial
Available-for-sale:
Amortized Cost	142,810	127,004
Gross Unrealized Gains	95	107
Gross Unrealized Losses	(6,927)	(7,174)
Allowance for Credit Losses	0	0
Total	135,978	119,937
Held-to-maturity:
Amortized Cost	263,610	266,500
Gross Unrecognized Gains	16	25
Gross Unrecognized Losses	(25,134)	(24,896)
Total	238,492	241,629
Allowance for Credit Losses	0	0
Corporate
Available-for-sale:
Amortized Cost	65,666	65,957
Gross Unrealized Gains	828	621
Gross Unrealized Losses	(1,161)	(1,445)
Allowance for Credit Losses	0	0
Total	$ 65,333	$ 65,133