Annual report [Section 13 and 15(d), not S-K Item 405]

INVESTMENT SECURITIES (Schedule of Amortized Cost and Related Market Value of Investment Securities Available-for-Sale) (Details)

v3.25.4
INVESTMENT SECURITIES (Schedule of Amortized Cost and Related Market Value of Investment Securities Available-for-Sale) (Details) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Available-for-sale    
Amortized Cost $ 656,546,000 $ 429,033,000
Unrealized Gains 2,051,000 64,000
Unrealized Losses 14,633,000 25,685,000
Allowance for Credit Loss (42,000) (67,000)
Fair Value 643,922,000 403,345,000
Federal Home Loan Bank 3,000,000.0 3,000,000.0
Federal Reserve Bank stock 5,100,000 5,100,000
Held to Maturity    
Amortized Cost 377,446,000 567,155,000
Unrealized Gains 930,000 16,000
Unrealized Losses 9,056,000 22,711,000
Fair value 369,320,000 544,460,000
U.S. Government Treasury [Member]    
Available-for-sale    
Amortized Cost 331,495,000 106,710,000
Unrealized Gains 1,940,000 25,000
Unrealized Losses 171,000 934,000
Allowance for Credit Loss 0 0
Fair Value 333,264,000 105,801,000
Held to Maturity    
Amortized Cost 129,782,000 368,005,000
Unrealized Gains 0 0
Unrealized Losses 514,000 6,476,000
Fair value 129,268,000 361,529,000
U.S. Government Agency [Member]    
Available-for-sale    
Amortized Cost 174,527,000 148,666,000
Unrealized Gains 71,000 39,000
Unrealized Losses 2,484,000 5,578,000
Allowance for Credit Loss 0 0
Fair Value 172,114,000 143,127,000
States and Political Subdivisions [Member]    
Available-for-sale    
Amortized Cost 36,918,000 43,212,000
Unrealized Gains 38,000 0
Unrealized Losses 2,045,000 3,827,000
Allowance for Credit Loss 0 (3,000)
Fair Value 34,911,000 39,382,000
Mortgage-Backed Securities [Member]    
Available-for-sale    
Amortized Cost 59,699,000 66,379,000
Unrealized Gains 2,000 0
Unrealized Losses 7,697,000 10,902,000
Allowance for Credit Loss 0 0
Fair Value 52,004,000 55,477,000
Held to Maturity    
Amortized Cost 247,664,000 199,150,000
Unrealized Gains 930,000 16,000
Unrealized Losses 8,542,000 16,235,000
Fair value 240,052,000 182,931,000
Corporate Debt Securities [Member]    
Available-for-sale    
Amortized Cost 45,810,000 55,970,000
Unrealized Gains 0 0
Unrealized Losses 2,236,000 4,444,000
Allowance for Credit Loss (42,000) (64,000)
Fair Value 43,532,000 51,462,000
Other Securities [Member]    
Available-for-sale    
Amortized Cost 8,097,000 8,096,000
Unrealized Gains 0 0
Unrealized Losses 0 0
Allowance for Credit Loss 0 0
Fair Value $ 8,097,000 $ 8,096,000