INVESTMENT SECURITIES (Available for Sale and Held to Maturity Investment Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 853,112	$ 819,534
Gross Unrealized Gains	3,235	4,787
Gross Unrealized Losses	(77,191)	(76,109)
Fair Value	779,156	748,212
ACL	0	0
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	554,548	562,391
Gross Unrecognized Gains	112	131
Gross Unrecognized Losses	(68,642)	(66,677)
Fair Value	486,018	495,845
ACL	0	0
States and political subdivisions
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	140,744	141,163
Gross Unrealized Gains	33	55
Gross Unrealized Losses	(24,924)	(24,177)
Fair Value	115,853	117,041
ACL	0	0
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	41,880	41,925
Gross Unrecognized Gains	0	0
Gross Unrecognized Losses	(7,613)	(7,226)
Fair Value	34,267	34,699
ACL	0	0
Corporate securities
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	5,000
Gross Unrealized Gains	3
Gross Unrealized Losses	0
Fair Value	5,003
ACL	0
U.S. Treasury and other government-sponsored entities and agencies
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	98,869	100,215
Gross Unrealized Gains	550	1,103
Gross Unrealized Losses	(1,308)	(1,293)
Fair Value	98,111	100,025
ACL	0	0
Collateralized loan obligations
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	74,824	40,960
Gross Unrealized Gains	0	32
Gross Unrealized Losses	(586)	(165)
Fair Value	74,238	40,827
ACL	0	0
Residential - U.S. government-sponsored entities and agencies
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	439,703	442,221
Gross Unrealized Gains	2,200	3,032
Gross Unrealized Losses	(38,256)	(38,200)
Fair Value	403,647	407,053
ACL	0	0
Schedule of Held-to-Maturity Securities [Line Items]
Amortized Cost	512,668	520,466
Gross Unrecognized Gains	112	131
Gross Unrecognized Losses	(61,029)	(59,451)
Fair Value	451,751	461,146
ACL	0	0
Residential - Non-government agencies
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	15,621	15,935
Gross Unrealized Gains	117	150
Gross Unrealized Losses	(700)	(722)
Fair Value	15,038	15,363
ACL	0	0
Commercial - U.S. government-sponsored entities and agencies
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	78,351	79,040
Gross Unrealized Gains	332	415
Gross Unrealized Losses	(11,417)	(11,552)
Fair Value	67,266	67,903
ACL	$ 0	$ 0