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SECURITIES - Unrealized Loss Analysis on Available-for-Sale and Held-to-Maturity Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Available-for-sale Securities |  |
Less than 12 months, fair value | $ 19,680 | $ 31,397
12 months or more, fair value | 984,431 | 1,002,690
Total fair value | 1,004,111 | 1,034,087
Less than 12 months, unrealized losses | 441 | 440
12 Months or more, unrealized losses | 189,600 | 174,334
Total unrealized losses | 190,041 | 174,774
U.S. government sponsored agencies |  |
Schedule of Available-for-sale Securities |  |
Less than 12 months, fair value | 0 | 0
12 months or more, fair value | 116,452 | 119,479
Total fair value | 116,452 | 119,479
Less than 12 months, unrealized losses | 0 | 0
12 Months or more, unrealized losses | 28,241 | 27,213
Total unrealized losses | 28,241 | 27,213
Mortgage-backed securities: residential |  |
Schedule of Available-for-sale Securities |  |
Less than 12 months, fair value | 1,325 | 52
12 months or more, fair value | 427,086 | 442,765
Total fair value | 428,411 | 442,817
Less than 12 months, unrealized losses | 11 | 0
12 Months or more, unrealized losses | 79,094 | 74,551
Total unrealized losses | 79,105 | 74,551
State and municipal securities |  |
Schedule of Available-for-sale Securities |  |
Less than 12 months, fair value | 18,355 | 31,345
12 months or more, fair value | 440,893 | 440,446
Total fair value | 459,248 | 471,791
Less than 12 months, unrealized losses | 430 | 440
12 Months or more, unrealized losses | 82,265 | 72,570
Total unrealized losses | $ 82,695 | $ 73,010

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