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SECURITIES - Unrealized Loss Analysis on Available-for-Sale and Held-to-Maturity Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Schedule of Available-for-sale Securities |  |
Less than 12 months, fair value | $ 19,656 | $ 31,397
12 months or more, fair value | 985,258 | 1,002,690
Total fair value | 1,004,914 | 1,034,087
Less than 12 months, unrealized losses | 396 | 440
12 Months or more, unrealized losses | 154,331 | 174,334
Total unrealized losses | 154,727 | 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 | 116,668 | 119,479
Total fair value | 116,668 | 119,479
Less than 12 months, unrealized losses | 0 | 0
12 Months or more, unrealized losses | 23,330 | 27,213
Total unrealized losses | 23,330 | 27,213
Mortgage-backed securities: residential |  |
Schedule of Available-for-sale Securities |  |
Less than 12 months, fair value | 35 | 52
12 months or more, fair value | 418,148 | 442,765
Total fair value | 418,183 | 442,817
Less than 12 months, unrealized losses | 1 | 0
12 Months or more, unrealized losses | 62,218 | 74,551
Total unrealized losses | 62,219 | 74,551
State and municipal securities |  |
Schedule of Available-for-sale Securities |  |
Less than 12 months, fair value | 19,621 | 31,345
12 months or more, fair value | 450,442 | 440,446
Total fair value | 470,063 | 471,791
Less than 12 months, unrealized losses | 395 | 440
12 Months or more, unrealized losses | 68,783 | 72,570
Total unrealized losses | $ 69,178 | $ 73,010

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