| Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis |
Assets and liabilities measured at fair value on a recurring basis, including financial assets and liabilities for which we have elected the fair value option, are summarized below: | | | | | | | | | | | | | | | | | | | | | | | | | | | Fair Value Measurements at September 30, 2026 Using | | (dollars in thousands) | Carrying Value | | Quoted Prices in Active Markets for Identical Assets (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Financial Assets | | | | | | | | | Equity securities | $ | 132,263 | | | $ | 132,263 | | | $ | — | | | $ | — | | | Investment securities available-for-sale: | | | | | | | | | U.S. Treasury | 191,586 | | | 191,586 | | | — | | | — | | | U.S. government-sponsored entities and agencies | 1,294,105 | | | — | | | 1,294,105 | | | — | | | Mortgage-backed securities - Agency | 9,415,911 | | | — | | | 9,415,911 | | | — | | | States and political subdivisions | 256,688 | | | — | | | 256,688 | | | — | | | Pooled trust preferred securities | 12,987 | | | — | | | 12,987 | | | — | | | Other securities | 145,357 | | | — | | | 145,357 | | | — | | | Loans held-for-sale | 30,456 | | | — | | | 30,456 | | | — | | | Derivative assets | 319,113 | | | — | | | 319,113 | | | — | | | Financial Liabilities | | | | | | | | | Derivative liabilities | 520,026 | | | — | | | 520,026 | | | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | Fair Value Measurements at December 31, 2025 Using | | (dollars in thousands) | Carrying Value | | Quoted Prices in Active Markets for Identical Assets (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Financial Assets | | | | | | | | | Equity securities | $ | 128,857 | | | $ | 128,857 | | | $ | — | | | $ | — | | | Investment securities available-for-sale: | | | | | | | | | U.S. Treasury | 214,544 | | | 214,544 | | | — | | | — | | | U.S. government-sponsored entities and agencies | 1,372,392 | | | — | | | 1,372,392 | | | — | | | Mortgage-backed securities - Agency | 9,168,035 | | | — | | | 9,168,035 | | | — | | | States and political subdivisions | 426,008 | | | — | | | 426,008 | | | — | | | Pooled trust preferred securities | 11,734 | | | — | | | 11,734 | | | — | | | Other securities | 191,737 | | | — | | | 191,737 | | | — | | | Loans held-for-sale | 52,911 | | | — | | | 52,911 | | | — | | | Derivative assets | 170,828 | | | — | | | 170,828 | | | — | | | Financial Liabilities | | | | | | | | | Derivative liabilities | 258,968 | | | — | | | 258,968 | | | — | |
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| Schedule of Quantitative Information about Significant Unobservable Inputs Used in Fair Value Measurements |
The table below provides quantitative information about significant unobservable inputs used in fair value measurements within Level 3 of the fair value hierarchy: | | | | | | | | | | | | | | | | | | | | | | | | | (dollars in thousands) | Fair Value | | Valuation Techniques | | Unobservable Input | | Range (Weighted Average) (1) | | September 30, 2026 | | | | | | | | | Collateral Dependent Loans | | | | | | | | | Commercial loans | $ | 81,438 | | | Discounted | | Discount for type of property, | | 7% - 50% (33%) | | | | cash flow | | age of appraisal, and current status | | | | Commercial real estate loans | 60,091 | | | Discounted | | Discount for type of property, | | 6% - 50% (18%) | | | | cash flow | | age of appraisal, and current status | | | | Foreclosed Assets | | | | | | | | Commercial real estate (2) | 143 | | | Fair value of | | Discount for type of property, | | —% | | | | collateral | | age of appraisal, and current status | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | | | | | | | | Collateral Dependent Loans | | | | | | | | | Commercial loans | $ | 55,471 | | | Discounted | | Discount for type of property, | | 8% - 50% (35%) | | | | cash flow | | age of appraisal, and current status | | | | Commercial real estate loans | 109,852 | | | Discounted | | Discount for type of property, | | 2% - 61% (17%) | | | | cash flow | | age of appraisal, and current status | | | | Foreclosed Assets | | | | | | | | Commercial real estate (2) | 975 | | | Fair value of | | Discount for type of property, | | 30% | | | | collateral | | age of appraisal, and current status | | | Residential (2) | 98 | | | Fair value of | | Discount for type of property, | | 44% | | | | collateral | | age of appraisal, and current status | | |
(1)Unobservable inputs were weighted by the relative fair value of the instruments. (2)There was only one foreclosed commercial real estate property at September 30, 2026 with no write-downs during the nine months ended September 30, 2026. There was only one foreclosed commercial real estate property and one foreclosed residential property at December 31, 2025 with write-downs during the year ended December 31, 2025, so no range or weighted average is reported.
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| Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments, Not Carried at Fair Value |
The carrying amounts and estimated fair values of financial instruments not carried at fair value were as follows: | | | | | | | | | | | | | | | | | | | | | | | | | | | Fair Value Measurements at September 30, 2026 Using | | (dollars in thousands) | Carrying Value | | Quoted Prices in Active Markets for Identical Assets (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Financial Assets | | | | | | | | Cash, due from banks, money market, and other interest-earning investments | $ | 1,679,028 | | | $ | 1,679,028 | | | $ | — | | | $ | — | | | Investment securities held-to-maturity: | | | | | | | | | U.S. government-sponsored entities and agencies | 827,022 | | | — | | | 646,493 | | | — | | | Mortgage-backed securities - Agency | 859,434 | | | — | | | 690,914 | | | — | | | State and political subdivisions | 1,136,471 | | | — | | | 926,490 | | | — | | | | | | | | | | | Loans, net: | | | | | | | | | Commercial | 16,007,510 | | | — | | | — | | | 16,188,235 | | | Commercial real estate | 22,451,446 | | | — | | | — | | | 22,693,254 | | | Residential real estate | 8,880,932 | | | — | | | — | | | 7,965,104 | | | Consumer credit | 3,228,517 | | | — | | | — | | | 3,313,561 | | | Accrued interest receivable | 308,943 | | | 1,106 | | | 70,514 | | | 237,323 | | | Financial Liabilities | | | | | | | | | Deposits: | | | | | | | | | Noninterest-bearing demand deposits | $ | 12,847,561 | | | $ | 12,847,561 | | | $ | — | | | $ | — | | Checking, NOW, savings, and money market interest-bearing deposits | 33,939,182 | | | 33,939,182 | | | — | | | — | | | Time deposits | 10,852,364 | | | — | | | 10,787,734 | | | — | | | Federal funds purchased and interbank borrowings | 484 | | | 484 | | | — | | | — | | | Securities sold under agreements to repurchase | 240,698 | | | 240,698 | | | — | | | — | | | FHLB advances | 5,484,611 | | | — | | | 5,451,538 | | | — | | | Other borrowings | 1,408,438 | | | — | | | 1,393,695 | | | — | | | Accrued interest payable | 66,631 | | | — | | | 66,631 | | | — | | | Standby letters of credit | 2,073 | | | — | | | — | | | 2,073 | | | | | | | | | | | Off-Balance Sheet Financial Instruments | | | | | | | | | Commitments to extend credit | $ | — | | | $ | — | | | $ | — | | | $ | 5,737 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | Fair Value Measurements at December 31, 2025 Using | | (dollars in thousands) | Carrying Value | | Quoted Prices in Active Markets for Identical Assets (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Financial Assets | | | | | | | | Cash, due from banks, money market, and other interest-earning investments | $ | 1,826,177 | | | $ | 1,826,177 | | | $ | — | | | $ | — | | | Investment securities held-to-maturity: | | | | | | | | | U.S. government-sponsored entities and agencies | 840,435 | | | — | | | 710,909 | | | — | | | Mortgage-backed securities - Agency | 910,323 | | | — | | | 782,818 | | | — | | | State and political subdivisions | 1,144,730 | | | — | | | 1,046,511 | | | — | | | Loans, net: | | | | | | | | | Commercial | 14,737,809 | | | — | | | — | | | 14,831,563 | | | Commercial real estate | 21,780,686 | | | — | | | — | | | 21,806,075 | | | Residential real estate | 8,433,102 | | | — | | | — | | | 7,526,511 | | | Consumer credit | 3,243,045 | | | — | | | — | | | 3,027,561 | | | Accrued interest receivable | 306,812 | | | 894 | | | 77,288 | | | 228,630 | | | Financial Liabilities | | | | | | | | | Deposits: | | | | | | | | | Noninterest-bearing demand deposits | $ | 13,247,483 | | | $ | 13,247,483 | | | $ | — | | | $ | — | | Checking, NOW, savings, and money market interest-bearing deposits | 32,179,688 | | | 32,179,688 | | | — | | | — | | | Time deposits | 9,661,024 | | | — | | | 9,540,748 | | | — | | | Federal funds purchased and interbank borrowings | 100,197 | | | 100,197 | | | — | | — | | | Securities sold under agreements to repurchase | 261,366 | | | 261,366 | | | — | | — | | | FHLB advances | 6,237,375 | | | — | | | 6,229,752 | | | — | | | Other borrowings | 852,429 | | | — | | | 853,938 | | | — | | | Accrued interest payable | 65,291 | | | — | | | 65,291 | | | — | | | Standby letters of credit | 1,672 | | | — | | | — | | | 1,672 | | | | | | | | | | | Off-Balance Sheet Financial Instruments | | | | | | | | | Commitments to extend credit | $ | — | | | $ | — | | | $ | — | | | $ | 5,687 | |
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