Quarterly report [Sections 13 or 15(d)]

INVESTMENT SECURITIES (Investment Portfolio Composition) (Details)

v3.26.1
INVESTMENT SECURITIES (Investment Portfolio Composition) (Details) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Available for Sale    
Amortized cost $ 816,203,000 $ 656,546,000
Unrealized Gains 721,000 2,051,000
Unrealized Losses 16,337,000 14,633,000
Allowance for Credit Losses (37,000) (42,000)
Fair Value 800,550,000 643,922,000
Federal Home Loan Bank 3,100,000 3,000,000.0
Federal Reserve Bank stock 5,100,000 5,100,000
Held to Maturity    
Amortized Cost 353,296,000 377,446,000
Unrealized Gains 295,000 930,000
Unrealized Losses 10,000,000 9,056,000
Fair Value 343,591,000 369,320,000
U.S. Government Treasury [Member]    
Available for Sale    
Amortized cost 488,048,000 331,495,000
Unrealized Gains 619,000 1,940,000
Unrealized Losses 1,681,000 171,000
Allowance for Credit Losses 0 0
Fair Value 486,986,000 333,264,000
Held to Maturity    
Amortized Cost 58,580,000 129,782,000
Unrealized Gains 0 0
Unrealized Losses 127,000 514,000
Fair Value 58,453,000 129,268,000
U.S. Government Agency [Member]    
Available for Sale    
Amortized cost 184,208,000 174,527,000
Unrealized Gains 74,000 71,000
Unrealized Losses 2,433,000 2,484,000
Allowance for Credit Losses 0 0
Fair Value 181,849,000 172,114,000
States and Political Subdivisions [Member]    
Available for Sale    
Amortized cost 36,717,000 36,918,000
Unrealized Gains 28,000 38,000
Unrealized Losses 2,014,000 2,045,000
Allowance for Credit Losses 0 0
Fair Value 34,731,000 34,911,000
Mortgage-Backed Securities [Member]    
Available for Sale    
Amortized cost 58,307,000 59,699,000
Unrealized Gains 0 2,000
Unrealized Losses 7,920,000 7,697,000
Allowance for Credit Losses 0 0
Fair Value 50,387,000 52,004,000
Held to Maturity    
Amortized Cost 294,716,000 247,664,000
Unrealized Gains 295,000 930,000
Unrealized Losses 9,873,000 8,542,000
Fair Value 285,138,000 240,052,000
Corporate Debt Securities [Member]    
Available for Sale    
Amortized cost 40,768,000 45,810,000
Unrealized Gains 0 0
Unrealized Losses 2,289,000 2,236,000
Allowance for Credit Losses (37,000) (42,000)
Fair Value 38,442,000 43,532,000
Other Securities [Member]    
Available for Sale    
Amortized cost 8,155,000 8,097,000
Unrealized Gains 0 0
Unrealized Losses 0 0
Allowance for Credit Losses 0 0
Fair Value $ 8,155,000 $ 8,097,000