Quarterly report [Sections 13 or 15(d)]

SECURITIES AND OTHER INVESTMENTS (Schedule of Carrying Value, Gross Unrealized Gains and Losses and Estimated Fair Value of Securities) (Details)

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SECURITIES AND OTHER INVESTMENTS (Schedule of Carrying Value, Gross Unrealized Gains and Losses and Estimated Fair Value of Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Schedule of Held-to-maturity Securities [Line Items]    
Total HTM Securities $ 845,326 $ 884,216
Gross Unrealized Gains 6 4,242
Gross Unrealized Losses (83,086) (31,646)
Held-to-maturity Securities, Fair Value 762,246 856,812
US States and Political Subdivisions Debt Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Total HTM Securities 766,166 793,162
Gross Unrealized Gains 6 4,139
Gross Unrealized Losses (69,089) (20,951)
Held-to-maturity Securities, Fair Value 697,083 776,350
Corporate Bond Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Total HTM Securities 1,424 2,255
Gross Unrealized Gains 0 0
Gross Unrealized Losses (24) (26)
Held-to-maturity Securities, Fair Value 1,400 2,229
Collateralized Mortgage-Backed Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Total HTM Securities 77,736 88,799
Commercial Mortgage-Backed Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Total HTM Securities 38,410 40,777
Gross Unrealized Gains 0 103
Gross Unrealized Losses (7,718) (6,123)
Held-to-maturity Securities, Fair Value 30,692 34,757
Residential Mortgage-Backed Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Total HTM Securities 39,326 48,022
Gross Unrealized Gains 0 0
Gross Unrealized Losses (6,255) (4,546)
Held-to-maturity Securities, Fair Value 33,071 43,476
Agency Securities [Member] | Commercial Mortgage-Backed Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Total HTM Securities 28,693 29,074
Gross Unrealized Gains 0 0
Gross Unrealized Losses (7,124) (5,619)
Held-to-maturity Securities, Fair Value 21,569 23,455
Agency Securities [Member] | Residential Mortgage-Backed Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Total HTM Securities 33,420 35,793
Gross Unrealized Gains 0 0
Gross Unrealized Losses (6,049) (4,397)
Held-to-maturity Securities, Fair Value 27,371 31,396
Non-agency | Commercial Mortgage-Backed Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Total HTM Securities 9,717 11,703
Gross Unrealized Gains 0 103
Gross Unrealized Losses (594) (504)
Held-to-maturity Securities, Fair Value 9,123 11,302
Non-agency | Residential Mortgage-Backed Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Total HTM Securities 5,906 12,229
Gross Unrealized Gains 0 0
Gross Unrealized Losses (206) (149)
Held-to-maturity Securities, Fair Value $ 5,700 $ 12,080