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AFS Securities - AFS Securities with Gross Unrealized Losses (Details)
$ in Thousands
Dec. 31, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Debt Securities, Available-for-sale [Line Items]    
Gross Unrealized Losses, Less Than Twelve Months $ 1,032 $ 671
Fair Value, Less Than Twelve Months 22,488 29,199
Gross Unrealized Losses, Twelve Months or More 10,060 25,825
Fair Value, Twelve Months or More 372,959 443,611
Total Unrealized Losses $ 11,092 $ 26,496
Number of Securities in an unrealized loss position, Less Than Twelve Months, Fair Value | security 38 175
Number of Securities in an unrealized loss position, Twelve Months or More, Fair Value | security 138 178
Number of Securities in an unrealized loss position. Total Unrealized Losses | security 176 353
Debt securities, available-for-sale, allowance for credit losses $ 0 $ 0
U.S. Treasury    
Debt Securities, Available-for-sale [Line Items]    
Gross Unrealized Losses, Less Than Twelve Months 0 0
Fair Value, Less Than Twelve Months 0 0
Gross Unrealized Losses, Twelve Months or More 2,793 10,236
Fair Value, Twelve Months or More 197,534 220,571
Total Unrealized Losses 2,793 10,236
States and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Gross Unrealized Losses, Less Than Twelve Months 993 486
Fair Value, Less Than Twelve Months 13,446 23,553
Gross Unrealized Losses, Twelve Months or More 1,704 4,090
Fair Value, Twelve Months or More 24,823 36,796
Total Unrealized Losses 2,697 4,576
Auction rate money market preferred    
Debt Securities, Available-for-sale [Line Items]    
Gross Unrealized Losses, Less Than Twelve Months 0 0
Fair Value, Less Than Twelve Months 0 0
Gross Unrealized Losses, Twelve Months or More 787 156
Fair Value, Twelve Months or More 2,413 3,044
Total Unrealized Losses 787 156
Mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Gross Unrealized Losses, Less Than Twelve Months 0 0
Fair Value, Less Than Twelve Months 0 0
Gross Unrealized Losses, Twelve Months or More 1,121 2,182
Fair Value, Twelve Months or More 22,252 26,886
Total Unrealized Losses 1,121 2,182
Collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Gross Unrealized Losses, Less Than Twelve Months 39 185
Fair Value, Less Than Twelve Months 9,042 5,646
Gross Unrealized Losses, Twelve Months or More 3,126 8,297
Fair Value, Twelve Months or More 120,016 149,028
Total Unrealized Losses 3,165 8,482
Corporate    
Debt Securities, Available-for-sale [Line Items]    
Gross Unrealized Losses, Less Than Twelve Months 0 0
Fair Value, Less Than Twelve Months 0 0
Gross Unrealized Losses, Twelve Months or More 529 864
Fair Value, Twelve Months or More 5,921 7,286
Total Unrealized Losses $ 529 $ 864