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INVESTMENT SECURITIES (Available for Sale and Held to Maturity Investment Securities) (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost $ 632,338,000 $ 664,883,000
Gross Unrecognized Gains 61,000 0
Gross Unrecognized Losses (67,221,000) (68,103,000)
Fair Value 565,178,000 596,780,000
ACL 0 0
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 754,950,000 801,370,000
Gross Unrecognized Gains 507,000 6,000
Gross Unrecognized Losses (108,247,000) (129,582,000)
Fair Value 647,210,000 671,794,000
ACL 0 0
States and political subdivisions    
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 41,959,000 41,840,000
Gross Unrecognized Gains 0 0
Gross Unrecognized Losses (6,706,000) (4,727,000)
Fair Value 35,253,000 37,113,000
ACL 0 0
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 156,432,000 172,427,000
Gross Unrecognized Gains 13,000 6,000
Gross Unrecognized Losses (29,810,000) (36,681,000)
Fair Value 126,635,000 135,752,000
ACL 0 0
Corporate securities    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 35,731,000 36,206,000
Gross Unrecognized Gains 0 0
Gross Unrecognized Losses (4,317,000) (5,995,000)
Fair Value 31,414,000 30,211,000
ACL 0 0
U.S. Treasury obligations and direct obligations of U.S Government agencies    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 28,105,000 28,032,000
Gross Unrecognized Gains 33,000 0
Gross Unrecognized Losses (1,941,000) (2,317,000)
Fair Value 26,197,000 25,715,000
ACL 0 0
Residential - U.S. Government-sponsored enterprises    
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 590,379,000 623,043,000
Gross Unrecognized Gains 61,000 0
Gross Unrecognized Losses (60,515,000) (63,376,000)
Fair Value 529,925,000 559,667,000
ACL 0 0
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 441,898,000 498,989,000
Gross Unrecognized Gains 95,000 0
Gross Unrecognized Losses (63,607,000) (75,186,000)
Fair Value 378,386,000 423,803,000
ACL 0 0
Residential - Non-Government Agencies    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 19,322,000 9,829,000
Gross Unrecognized Gains 366,000 0
Gross Unrecognized Losses (980,000) (1,167,000)
Fair Value 18,708,000 8,662,000
ACL 0 0
Commercial - U.S. Government-sponsored enterprises    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 58,318,000 54,346,000
Gross Unrecognized Gains 0 0
Gross Unrecognized Losses (7,404,000) (8,202,000)
Fair Value 50,914,000 46,144,000
ACL 0 0
Commercial - Non-government agencies    
Debt Securities, Available-for-Sale [Line Items]    
Amortized Cost 15,144,000 1,541,000
Gross Unrecognized Gains 0 0
Gross Unrecognized Losses (188,000) (34,000)
Fair Value 14,956,000 1,507,000
ACL $ 0 $ 0