INVESTMENT SECURITIES (Available for Sale and Held to Maturity Investment Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 913,350	$ 819,534
Gross Unrealized Gains	252	4,787
Gross Unrealized Losses	(107,372)	(76,109)
Fair Value	806,230	748,212
ACL	0	0
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	535,182	562,391
Gross Unrecognized Gains	0	131
Gross Unrecognized Losses	(100,548)	(66,677)
Fair Value	434,634	495,845
ACL	0	0
States and political subdivisions
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	140,209	141,163
Gross Unrealized Gains	0	55
Gross Unrealized Losses	(31,406)	(24,177)
Fair Value	108,803	117,041
ACL	0	0
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	41,794	41,925
Gross Unrecognized Gains	0	0
Gross Unrecognized Losses	(9,068)	(7,226)
Fair Value	32,726	34,699
ACL	0	0
Corporate securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	15,000
Gross Unrealized Gains	16
Gross Unrealized Losses	(331)
Fair Value	14,685
ACL	0
U.S. Treasury and other government-sponsored entities and agencies
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	95,307	100,215
Gross Unrealized Gains	26	1,103
Gross Unrealized Losses	(3,452)	(1,293)
Fair Value	91,881	100,025
ACL	0	0
Collateralized loan obligations
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	110,147	40,960
Gross Unrealized Gains	50	32
Gross Unrealized Losses	(142)	(165)
Fair Value	110,055	40,827
ACL	0	0
Residential - U.S. government-sponsored entities and agencies
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	455,824	442,221
Gross Unrealized Gains	10	3,032
Gross Unrealized Losses	(56,136)	(38,200)
Fair Value	399,698	407,053
ACL	0	0
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	493,388	520,466
Gross Unrecognized Gains	0	131
Gross Unrecognized Losses	(91,480)	(59,451)
Fair Value	401,908	461,146
ACL	0	0
Residential - Non-government agencies
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	14,768	15,935
Gross Unrealized Gains	0	150
Gross Unrealized Losses	(1,394)	(722)
Fair Value	13,374	15,363
ACL	0	0
Commercial - U.S. government-sponsored entities and agencies
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	82,095	79,040
Gross Unrealized Gains	150	415
Gross Unrealized Losses	(14,511)	(11,552)
Fair Value	67,734	67,903
ACL	$ 0	$ 0

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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