v3.26.1
Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis The tables below summarize financial assets and financial liabilities measured at fair value on a recurring basis as of June 30, 2026 and December 31, 2025, segregated by the level of the valuation inputs within the fair value hierarchy of ASC Topic 820 utilized to measure fair value.
Level 1 InputsLevel 2 InputsLevel 3 InputsTotal Fair Value
June 30, 2026
Securities available for sale:
U.S. Treasury$2,925,951 $— $— $2,925,951 
Residential mortgage-backed securities— 9,819,310 — 9,819,310 
States and political subdivisions— 5,302,145 — 5,302,145 
Other— 42,567 — 42,567 
Trading account securities:
U.S. Treasury38,037 — — 38,037 
States and political subdivisions— 1,116 — 1,116 
Derivative assets:
Interest rate swaps, caps, and floors— 55,257 — 55,257 
Commodity swaps and options— 62,313 — 62,313 
Derivative liabilities:
Interest rate swaps, caps, and floors— 54,846 — 54,846 
Commodity swaps and options— 60,177 — 60,177 
December 31, 2025
Securities available for sale:
U.S. Treasury$2,456,517 $— $— $2,456,517 
Residential mortgage-backed securities— 8,121,794 — 8,121,794 
States and political subdivisions— 5,349,857 — 5,349,857 
Other— 42,428 — 42,428 
Trading account securities:
U.S. Treasury36,650 — — 36,650 
States and political subdivisions— 954 — 954 
Derivative assets:
Interest rate swaps, caps, and floors— 58,663 — 58,663 
Commodity swaps and options— 52,364 — 52,364 
Derivative liabilities:
Interest rate swaps, caps, and floors— 58,665 — 58,665 
Commodity swaps and options— 50,598 — 50,598 
Impaired Loans Remeasured And Reported At Fair Value Specific Valuation Allowance Allocation Method Of Underlying Collateral [Table Text Block]
The following table presents collateral dependent loans that were remeasured and reported at fair value through a specific allocation of the allowance for credit losses on loans based upon the fair value of the underlying collateral during the reported periods.
Six Months Ended
June 30, 2026		Six Months Ended
June 30, 2025
Level 2Level 3Level 2Level 3
Carrying value before allocations$61,352 $7,401 $6,691 $15,830 
Specific (allocations) reversals of prior allocations(2,191)(771)(528)(1,921)
Fair value$59,161 $6,630 $6,163 $13,909 
Foreclosed Assets Remeasured And Reported At Fair Value
The following table presents foreclosed assets that were remeasured and reported at fair value during the reported periods:
Six Months Ended
June 30,
20262025
Foreclosed assets remeasured subsequent to initial recognition:
Carrying value of foreclosed assets prior to remeasurement$867 $— 
Write-downs included in other non-interest expense(212)— 
Fair value$655 $— 
Estimated Fair Values of Financial Instruments The estimated fair values of financial instruments that are reported at amortized cost in our consolidated balance sheets, segregated by the level of the valuation inputs within the fair value hierarchy of ASC 820 utilized to measure fair value, were as follows:
June 30, 2026December 31, 2025
Carrying
Amount		Estimated
Fair Value		Carrying
Amount		Estimated
Fair Value
Financial assets:
Level 2 inputs:
Cash and cash equivalents$6,467,194 $6,467,194 $8,874,055 $8,874,055 
Securities held to maturity3,385,507 3,250,816 3,431,179 3,295,431 
Accrued interest receivable255,130 255,130 256,093 256,093 
Level 3 inputs:
Loans, net22,691,946 22,509,277 21,610,317 21,559,335 
Financial liabilities:
Level 2 inputs:
Deposits43,334,015 43,320,873 42,917,864 42,908,091 
Federal funds purchased25,500 25,500 18,775 18,775 
Repurchase agreements4,886,598 4,886,598 4,525,855 4,525,855 
Junior subordinated deferrable interest debentures123,271 123,712 123,242 123,712 
Subordinated notes99,883 99,832 99,804 100,053 
Accrued interest payable43,694 43,694 45,737 45,737