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INVESTMENTS (Summary of Amortized Cost and Fair Value of Held to Maturity Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost $ 526,251 $ 544,931
Unrealized Gains 1,999 3,134
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (27,631) (37,470)
Held-to-maturity securities, fair value 500,619 510,595
Obligations of U.S. government-sponsored enterprises    
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost 7,695 7,593
Unrealized Gains 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (329) (528)
Held-to-maturity securities, fair value 7,366 7,065
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss 890 992
Obligations of states and political subdivisions    
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost 56,476 56,262
Unrealized Gains 673 1,242
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (531) (731)
Held-to-maturity securities, fair value 56,618 56,773
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss 5,300 5,600
MBS issued or guaranteed by U.S. government-sponsored enterprises    
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost 295,229 304,850
Unrealized Gains 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (16,269) (21,623)
Held-to-maturity securities, fair value 278,960 283,227
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss 31,700 34,600
CMO issued or guaranteed by U.S. government-sponsored enterprises    
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost 147,551 157,118
Unrealized Gains 393 515
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (9,731) (13,497)
Held-to-maturity securities, fair value 138,213 144,136
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss 16,900 18,400
Corporate bonds    
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost 19,300 19,108
Unrealized Gains 933 1,377
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (771) (1,091)
Held-to-maturity securities, fair value 19,462 19,394
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss $ 62 $ 85