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INVESTMENTS (Summary of Amortized Cost and Fair Value of Held to Maturity Securities) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
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Schedule of Investments [Line Items] |  |
Held-to-maturity securities, at amortized cost | $ 540,349 | $ 544,931
Unrealized Gains | 1,095 | 3,134
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (44,927) | (37,470)
Held-to-maturity securities, fair value | 496,517 | 510,595
Obligations of U.S. government-sponsored enterprises |  |
Schedule of Investments [Line Items] |  |
Held-to-maturity securities, at amortized cost | 7,627 | 7,593
Unrealized Gains | 0 | 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (641) | (528)
Held-to-maturity securities, fair value | 6,986 | 7,065
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss | 958 | 992
Obligations of states and political subdivisions |  |
Schedule of Investments [Line Items] |  |
Held-to-maturity securities, at amortized cost | 56,333 | 56,262
Unrealized Gains | 331 | 1,242
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (884) | (731)
Held-to-maturity securities, fair value | 55,780 | 56,773
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss | 5,500 | 5,600
MBS issued or guaranteed by U.S. government-sponsored enterprises |  |
Schedule of Investments [Line Items] |  |
Held-to-maturity securities, at amortized cost | 302,177 | 304,850
Unrealized Gains | 0 | 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (28,030) | (21,623)
Held-to-maturity securities, fair value | 274,147 | 283,227
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss | 33,700 | 34,600
Collateralized mortgage obligations issued or guaranteed by U.S. government-sponsored enterprises |  |
Schedule of Investments [Line Items] |  |
Held-to-maturity securities, at amortized cost | 155,040 | 157,118
Unrealized Gains | 249 | 515
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (14,156) | (13,497)
Held-to-maturity securities, fair value | 141,133 | 144,136
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss | 17,900 | 18,400
Corporate bonds |  |
Schedule of Investments [Line Items] |  |
Held-to-maturity securities, at amortized cost | 19,172 | 19,108
Unrealized Gains | 515 | 1,377
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | (1,216) | (1,091)
Held-to-maturity securities, fair value | 18,471 | 19,394
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss | $ 78 | $ 85

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