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INVESTMENTS (Summary of Amortized Cost and Fair Value of Held to Maturity Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost $ 495,007 $ 517,778
Unrealized Gains 1,290 722
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (31,746) (47,676)
Held-to-maturity securities, fair value 464,551 470,824
Obligations of U.S. government-sponsored enterprises    
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost 7,831 7,729
Unrealized Gains 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (331) (647)
Held-to-maturity securities, fair value 7,500 7,082
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss 754 856
Obligations of states and political subdivisions    
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost 55,731 56,047
Unrealized Gains 81 96
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (1,914) (1,872)
Held-to-maturity securities, fair value 53,898 54,271
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss 4,700 5,100
MBS issued or guaranteed by U.S. government-sponsored enterprises    
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost 274,347 292,170
Unrealized Gains 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (18,158) (28,980)
Held-to-maturity securities, fair value 256,189 263,190
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss 27,700 30,800
CMO issued or guaranteed by U.S. government-sponsored enterprises    
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost 132,633 142,467
Unrealized Gains 114 150
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (11,118) (15,747)
Held-to-maturity securities, fair value 121,629 126,870
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss 14,900 16,400
Subordinated corporate bonds    
Schedule of Investments [Line Items]    
Held-to-maturity securities, at amortized cost 24,465 19,365
Unrealized Gains 1,095 476
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (225) (430)
Held-to-maturity securities, fair value 25,335 19,411
Debt Securities, Held-to-Maturity, Amortized Cost, Unamortized Unrealized Loss $ 31 $ 54