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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2024
Fair Value Disclosures [Abstract] |
Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis | The following tables summarize financial assets and financial liabilities measured at fair value on a recurring basis as of December 31, 2024 and 2023, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:
| Level 1 Inputs |  | Level 2 Inputs |  | Level 3 Inputs |  | Total Fair Value
2024 |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |
U.S. Treasury | $ | 3,442,320 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,442,320 |
Residential mortgage-backed securities | — |  |  | 6,997,902 |  |  | — |  |  | 6,997,902 |
States and political subdivisions | — |  |  | 4,560,224 |  |  | — |  |  | 4,560,224 |
Other | — |  |  | 43,179 |  |  | — |  |  | 43,179 |
Trading account securities: |  |  |  |  |  |  |
U.S. Treasury | 33,910 |  |  | — |  |  | — |  |  | 33,910 |
States and political subdivisions | — |  |  | — |  |  | — |  |  | — |
Derivative assets: |  |  |  |  |  |  |
Interest rate swaps, caps and floors | — |  |  | 79,122 |  |  | — |  |  | 79,122 |
Commodity swaps and options | — |  |  | 48,503 |  |  | — |  |  | 48,503 |
Foreign currency forward/option contracts | — |  |  | — |  |  | — |  |  | — |
Derivative liabilities: |  |  |  |  |  |  |
Interest rate swaps, caps and floors | — |  |  | 79,122 |  |  | — |  |  | 79,122 |
Commodity swaps and options | — |  |  | 47,304 |  |  | — |  |  | 47,304 |
Foreign currency forward/option contracts | — |  |  | — |  |  | — |  |  | — |
2023 |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |
U.S. Treasury | $ | 4,927,589 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,927,589 |
Residential mortgage-backed securities | — |  |  | 6,596,682 |  |  | — |  |  | 6,596,682 |
States and political subdivisions | — |  |  | 5,011,331 |  |  | — |  |  | 5,011,331 |
Other | — |  |  | 42,769 |  |  | — |  |  | 42,769 |
Trading account securities: |  |  |  |  |  |  |
U.S. Treasury | 30,265 |  |  | — |  |  | — |  |  | 30,265 |
States and political subdivisions | — |  |  | 1,452 |  |  | — |  |  | 1,452 |
Derivative assets: |  |  |  |  |  |  |
Interest rate swaps, caps and floors | — |  |  | 90,715 |  |  | — |  |  | 90,715 |
Commodity swaps and options | — |  |  | 70,710 |  |  | — |  |  | 70,710 |
Foreign currency forward contracts | — |  |  | 22 |  |  | — |  |  | 22 |
Derivative liabilities: |  |  |  |  |  |  |
Interest rate swaps, caps and floors | — |  |  | 90,525 |  |  | — |  |  | 90,525 |
Commodity swaps and options | — |  |  | 69,447 |  |  | — |  |  | 69,447 |
Foreign currency forward contracts | — |  |  | 19 |  |  | — |  |  | 19 |
Impaired Loans Remeasured and Reported at Fair Value of Underlying Collateral | 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:
| 2024 |  | 2023 |  | 2022
Level 2 |  |  |  |  |
Carrying value before allocations | $ | 4,982 |  |  | $ | 19,719 |  |  | $ | 6,237 |
Specific (allocations) reversals of prior allocations | (650) |  |  | (3,391) |  |  | (1,480) |
Fair value | $ | 4,332 |  |  | $ | 16,328 |  |  | $ | 4,757 |
Level 3 |  |  |  |  |
Carrying value before allocations | $ | 37,082 |  |  | $ | 15,465 |  |  | $ | 8,156 |
Specific (allocations) reversals of prior allocations | (10,987) |  |  | (2,344) |  |  | 625 |
Fair value | $ | 26,095 |  |  | $ | 13,121 |  |  | $ | 8,781 |
Foreclosed Assets Remeasured And Reported At Fair Value | The following table presents foreclosed assets that were remeasured and reported at fair value:
| 2024 |  | 2023 |  | 2022
Foreclosed assets remeasured at initial recognition: |  |  |  |  |
Carrying value of foreclosed assets prior to remeasurement | $ | 19,297 |  |  | $ | — |  |  | $ | 239 |
Charge-offs recognized in the allowance for credit losses on loans | (3,797) |  |  | — |  |  | — |
Fair value | $ | 15,500 |  |  | $ | — |  |  | $ | 239 |
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 valuation inputs within the fair value hierarchy utilized to measure fair value, were as follows:
| December 31, 2024 |  | December 31, 2023
| Carrying Amount |  | Estimated Fair Value |  | Carrying Amount |  | Estimated Fair Value
Financial assets: |  |  |  |  |  |  |
Level 2 inputs: |  |  |  |  |  |  |
Cash and cash equivalents | $ | 10,234,258 |  |  | $ | 10,234,258 |  |  | $ | 8,687,276 |  |  | $ | 8,687,276 |
Securities held to maturity | 3,533,775 |  |  | 3,360,546 |  |  | 3,619,428 |  |  | 3,532,044 |
Accrued interest receivable | 236,591 |  |  | 236,591 |  |  | 251,385 |  |  | 251,385 |
Level 3 inputs: |  |  |  |  |  |  |
Loans, net | 20,484,662 |  |  | 20,066,512 |  |  | 18,578,255 |  |  | 18,117,369 |
Financial liabilities: |  |  |  |  |  |  |
Level 2 inputs: |  |  |  |  |  |  |
Deposits | 42,722,748 |  |  | 42,712,907 |  |  | 41,920,568 |  |  | 41,903,580 |
Federal funds purchased | 21,975 |  |  | 21,975 |  |  | 14,200 |  |  | 14,200 |
Repurchase agreements | 4,342,941 |  |  | 4,342,941 |  |  | 4,127,188 |  |  | 4,127,188 |
Junior subordinated deferrable interest debentures | 123,184 |  |  | 123,712 |  |  | 123,127 |  |  | 123,712 |
Subordinated notes | 99,648 |  |  | 98,453 |  |  | 99,491 |  |  | 96,071 |
Accrued interest payable | 58,870 |  |  | 58,870 |  |  | 61,222 |  |  | 61,222 |

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