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INVESTMENT SECURITIES (Available for Sale and Held to Maturity Investment Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost $ 835,361 $ 843,774
Gross Unrealized Gains 4,213 352
Gross Unrealized Losses (80,891) (106,468)
Fair Value 758,683 737,658
ACL 0 0
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 570,886 596,930
Gross Unrecognized Gains 137 0
Gross Unrecognized Losses (70,164) (90,249)
Fair Value 500,859 506,681
ACL 0 0
States and political subdivisions    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 141,949 147,014
Gross Unrealized Gains 78 2
Gross Unrealized Losses (25,780) (30,183)
Fair Value 116,247 116,833
ACL 0 0
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 41,956 42,016
Gross Unrecognized Gains 0 0
Gross Unrecognized Losses (8,416) (8,884)
Fair Value 33,540 33,132
ACL 0 0
U.S. Treasury and other government-sponsored entities and agencies    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 101,244 83,861
Gross Unrealized Gains 1,056 81
Gross Unrealized Losses (1,539) (2,742)
Fair Value 100,761 81,200
ACL 0 0
Collateralized loan obligations    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 40,973 31,254
Gross Unrealized Gains 48 0
Gross Unrealized Losses (118) (114)
Fair Value 40,903 31,140
ACL 0 0
Residential - U.S. government-sponsored entities and agencies    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 454,994 472,476
Gross Unrealized Gains 2,466 42
Gross Unrealized Losses (40,905) (58,047)
Fair Value 416,555 414,471
ACL 0 0
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 528,930 554,914
Gross Unrecognized Gains 137 0
Gross Unrecognized Losses (61,748) (81,365)
Fair Value 467,319 473,549
ACL 0 0
Residential - Non-government agencies    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 16,479 17,836
Gross Unrealized Gains 205 151
Gross Unrealized Losses (721) (1,061)
Fair Value 15,963 16,926
ACL 0 0
Commercial - U.S. government-sponsored entities and agencies    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 79,722 81,400
Gross Unrealized Gains 360 76
Gross Unrealized Losses (11,828) (14,315)
Fair Value 68,254 67,161
ACL $ 0 0
Commercial - Non-government agencies    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost   9,933
Gross Unrealized Gains   0
Gross Unrealized Losses   (6)
Fair Value   9,927
ACL   $ 0