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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
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