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INVESTMENTS (Schedule of Unrealized Gross Losses and Estimated Fair values of Investment Securities) (Details) $ in Thousands | Mar. 31, 2024 USD ($) security | Dec. 31, 2023 USD ($) security
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Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 204 | 205
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 39,239 | $ 35,439
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 88 | 74
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 471,880 | 488,825
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (84,424) | (78,848)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total | 511,119 | 524,264
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 84,512 | $ 78,922
Obligations of states and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 7 | 6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 1,434 | $ 2,345
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 16 | 6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 2,233 | 1,437
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (42) | (38)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total | 3,667 | 3,782
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 58 | $ 44
Mortgage-backed securities issued or guaranteed by U.S. government-sponsored enterprises |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 144 | 145
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 27,229 | $ 13,474
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 40 | 23
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 390,388 | 407,200
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (72,341) | (65,955)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total | 417,617 | 420,674
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 72,381 | $ 65,978
CMO issued or guaranteed by U.S. government-sponsored enterprises |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 41 | 43
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 9,581 | $ 19,620
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 27 | 45
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 60,851 | 62,869
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (9,768) | (9,492)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total | 70,432 | 82,489
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 9,795 | $ 9,537
Corporate bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 12 | 11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 995 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 5 | 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 18,408 | 17,319
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (2,273) | (3,363)
Debt Securities, Available-for-sale, Unrealized Loss Position, Total | 19,403 | 17,319
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 2,278 | $ 3,363

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