v3.26.1
INVESTMENTS (Summary of Amortized Costs and Estimated Fair Values of Available-For-Sale Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Abstract]    
Amortized Cost, Total $ 937,123 $ 972,686
Available-for-sale securities, at fair value (amortized cost of $937,123 and $972,686, respectively) 892,153 930,401
Obligations of states and political subdivisions    
Debt Securities, Available-for-sale [Abstract]    
Amortized Cost, Total 5,303 5,303
Unrealized Gains 1 1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 32 29
Available-for-sale securities, at fair value (amortized cost of $937,123 and $972,686, respectively) 5,272 5,275
MBS issued or guaranteed by U.S. government-sponsored enterprises    
Debt Securities, Available-for-sale [Abstract]    
Amortized Cost, Total 701,390 720,634
Unrealized Gains 5,253 7,540
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 43,390 43,785
Available-for-sale securities, at fair value (amortized cost of $937,123 and $972,686, respectively) 663,253 684,389
CMO issued or guaranteed by U.S. government-sponsored enterprises    
Debt Securities, Available-for-sale [Abstract]    
Amortized Cost, Total 213,691 230,028
Unrealized Gains 804 1,141
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 7,361 6,796
Available-for-sale securities, at fair value (amortized cost of $937,123 and $972,686, respectively) 207,134 224,373
Subordinated corporate bonds    
Debt Securities, Available-for-sale [Abstract]    
Amortized Cost, Total 16,739 16,721
Unrealized Gains 16 16
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 261 373
Available-for-sale securities, at fair value (amortized cost of $937,123 and $972,686, respectively) 16,494 16,364
Total AFS debt securities    
Debt Securities, Available-for-sale [Abstract]    
Amortized Cost, Total 937,123 972,686
Unrealized Gains 6,074 8,698
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 51,044 50,983
Available-for-sale securities, at fair value (amortized cost of $937,123 and $972,686, respectively) $ 892,153 $ 930,401