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AFS Securities
12 Months Ended
Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]  
AFS Securities AFS Securities
The amortized cost and fair value of AFS securities, with gross unrealized gains and losses, are as follows as of December 31:
 2025
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
U.S. Treasury$200,327 $— $2,793 $197,534 
States and political subdivisions71,857 45 2,697 69,205 
Auction rate money market preferred3,200 — 787 2,413 
Mortgage-backed securities23,373 — 1,121 22,252 
Collateralized mortgage obligations202,482 1,149 3,165 200,466 
Corporate6,450 — 529 5,921 
Total$507,689 $1,194 $11,092 $497,791 
 2024
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
U.S. Treasury$230,807 $— $10,236 $220,571 
States and political subdivisions81,135 4,576 76,568 
Auction rate money market preferred3,200 — 156 3,044 
Mortgage-backed securities29,068 — 2,182 26,886 
Collateralized mortgage obligations163,156 — 8,482 154,674 
Corporate8,150 — 864 7,286 
Total$515,516 $$26,496 $489,029 
The amortized cost and fair value of AFS securities by contractual maturity at December 31, 2025 are as follows:
MaturingSecurities with Variable Monthly Payments or Noncontractual Maturities
Due in
One Year
or Less
After One
Year But
Within
Five Years
After Five
Years But
Within
Ten Years
After
Ten Years
Total
U.S. Treasury$190,389 $9,938 $— $— $— $200,327 
States and political subdivisions12,942 17,400 19,997 21,518 — 71,857 
Auction rate money market preferred— — — — 3,200 3,200 
Mortgage-backed securities— — — — 23,373 23,373 
Collateralized mortgage obligations— — — — 202,482 202,482 
Corporate— — 6,450 — — 6,450 
Total amortized cost$203,331 $27,338 $26,447 $21,518 $229,055 $507,689 
Fair value$200,813 $26,931 $24,735 $20,181 $225,131 $497,791 
Expected maturities for government sponsored enterprises and states and political subdivisions may differ from contractual maturities because issuers may have the right to call or prepay obligations.
As the auction rate money market preferred investments have continual call dates, they are not reported by a specific maturity group. Because of their variable monthly payments, mortgage-backed securities and collateralized mortgage obligations are not reported by a specific maturity group.
A summary of the sales activity of AFS securities during the years ended December 31 is displayed in the following table.
 202520242023
Proceeds from sales of AFS securities$— $— $18,089 
Realized gains (losses)— — 67 
Applicable income tax expense (benefit)— — 14 
The information in the following tables pertains to AFS securities with gross unrealized losses aggregated by investment category and length of time that individual securities have been in a continuous loss position at December 31:
 2025
 Less Than Twelve MonthsTwelve Months or More 
Gross
Unrealized
Losses
Fair
Value
Gross
Unrealized
Losses
Fair
Value
Total
Unrealized
Losses
U.S. Treasury$— $— $2,793 $197,534 $2,793 
States and political subdivisions993 13,446 1,704 24,823 2,697 
Auction rate money market preferred— — 787 2,413 787 
Mortgage-backed securities— — 1,121 22,252 1,121 
Collateralized mortgage obligations39 9,042 3,126 120,016 3,165 
Corporate— — 529 5,921 529 
Total$1,032 $22,488 $10,060 $372,959 $11,092 
Number of securities in an unrealized loss position:38 138 176 
 2024
 Less Than Twelve MonthsTwelve Months or More
Gross
Unrealized
Losses
Fair
Value
Gross
Unrealized
Losses
Fair
Value
Total
Unrealized
Losses
U.S. Treasury$— $— $10,236 $220,571 $10,236 
States and political subdivisions486 23,553 4,090 36,796 4,576 
Auction rate money market preferred— — 156 3,044 156 
Mortgage-backed securities— — 2,182 26,886 2,182 
Collateralized mortgage obligations185 5,646 8,297 149,028 8,482 
Corporate— — 864 7,286 864 
Total$671 $29,199 $25,825 $443,611 $26,496 
Number of securities in an unrealized loss position:175 178 353 
As of December 31, 2025, no ACL has been recognized on AFS securities in an unrealized loss position, as management does not believe any of the securities are impaired due to reasons of credit quality. This is based on our analysis of the underlying risk characteristics, including credit ratings, and other qualitative factors related to our AFS securities and consideration of our historical credit loss experience and internal forecasts. The issuers of these securities continue to make timely principal and interest payments under the contractual terms of the securities. Management does not currently intend to sell any of the securities classified as AFS in the table above, and believes it is more likely than not that we will not have to sell any such securities before a recovery of cost. The unrealized losses are generally due to a continued elevated market interest rate environment compared to the yields available at the time the underlying securities were purchased. The fair value is expected to recover as the securities approach their respective maturity date or repricing date, or if the market yields for such investments decline.