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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2025
Fair Value Disclosures [Abstract] |
Schedule of Financial Instruments Measured on Recurring Basis | The following table sets forth the Company’s financial assets by level within the fair value hierarchy that were measured at fair value on a recurring basis as of September 30, 2025 and December 31, 2024.
|  |  |  | Fair Value Measurements Using
(In thousands) |  | Fair Value |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
September 30, 2025 |  |  |  |  |  |  |  |
Available-for-sale securities |  |  |  |  |  |  |  |
U.S. Government agencies |  | $ | 48,355 |  |  | $ | — |  |  | $ | 48,355 |  |  | $ | — |
Mortgage-backed securities |  | 2,249,593 |  |  | — |  |  | 2,249,593 |  |  | — |
State and political subdivisions |  | 845,371 |  |  | — |  |  | 845,371 |  |  | — |
Other securities |  | 175,958 |  |  | — |  |  | 175,958 |  |  | — |
Mortgage loans held for sale |  | 15,507 |  |  | — |  |  | — |  |  | 15,507 |
Assets held in trading accounts |  | 12,695 |  |  | 12,695 |  |  | — |  |  | — |
Derivative asset |  | 96,065 |  |  | — |  |  | 96,065 |  |  | — |
Derivative liability |  | (35,363) |  |  | — |  |  | (35,363) |  |  | — |
December 31, 2024 |  |  |  |  |  |  |  |
Available-for-sale securities |  |  |  |  |  |  |  |
U.S. Treasury |  | $ | 996 |  |  | $ | 996 |  |  | $ | — |  |  | $ | — |
U.S. Government agencies |  | 54,547 |  |  | — |  |  | 54,547 |  |  | — |
Mortgage-backed securities |  | 1,392,759 |  |  | — |  |  | 1,392,759 |  |  | — |
States and political subdivisions |  | 858,182 |  |  | — |  |  | 858,182 |  |  | — |
Other securities |  | 222,942 |  |  | — |  |  | 222,942 |  |  | — |
Mortgage loans held for sale |  | 11,417 |  |  | — |  |  | — |  |  | 11,417 |
Derivative asset |  | 127,474 |  |  | — |  |  | 127,474 |  |  | — |
Derivative liability |  | (24,032) |  |  | — |  |  | (24,032) |  |  | — |
Schedule of Financial Assets Measure on Nonrecurring Basis | The following table sets forth the Company’s assets by level within the fair value hierarchy that were measured at fair value on a nonrecurring basis as of September 30, 2025 and December 31, 2024.
|  |  | Fair Value Measurements Using
(In thousands) | Fair Value |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
September 30, 2025 |  |  |  |  |  |  |
Individually assessed loans (1) (2) (collateral-dependent) | $ | 108,416 |  |  | $ | — |  |  | $ | — |  |  | $ | 108,416 |
Foreclosed assets and other real estate owned (1) | 830 |  |  | — |  |  | — |  |  | 830 |
December 31, 2024 |  |  |  |  |  |  |
Individually assessed loans (1) (2) (collateral-dependent) | $ | 102,580 |  |  | $ | — |  |  | $ | — |  |  | $ | 102,580 |
Foreclosed assets and other real estate owned (1) | 881 |  |  | — |  |  | — |  |  | 881 |
________________________ (1)These amounts represent the resulting carrying amounts on the consolidated balance sheets for collateral-dependent loans and foreclosed assets and other real estate owned for which fair value re-measurements took place during the period. (2)Identified reserves of $40.8 million and $30.1 million were related to collateral-dependent loans for which fair value re-measurements took place during the periods ended September 30, 2025 and December 31, 2024, respectively.
Schedule of Estimated Fair Values and Related Carrying Amounts | The estimated fair values, and related carrying amounts, of the Company’s financial instruments are as follows:
| Carrying |  | Fair Value Measurements
(In thousands) | Amount |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
September 30, 2025 |  |  |  |  |  |  |  |  |
Financial assets: |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 643,617 |  |  | $ | 643,617 |  |  | $ | — |  |  | $ | — |  |  | $ | 643,617 |
Interest bearing balances due from banks - time | 100 |  |  | — |  |  | 100 |  |  | — |  |  | 100 |
Interest receivable | 104,383 |  |  | — |  |  | 104,383 |  |  | — |  |  | 104,383 |
Loans, net | 16,930,811 |  |  | — |  |  | — |  |  | 16,437,397 |  |  | 16,437,397 |
Financial liabilities: |  |  |  |  |  |  |  |  |
Noninterest bearing transaction accounts | 4,377,232 |  |  | — |  |  | 4,377,232 |  |  | — |  |  | 4,377,232 |
Interest bearing transaction accounts and savings deposits | 10,932,914 |  |  | — |  |  | 10,932,914 |  |  | — |  |  | 10,932,914 |
Time deposits | 4,527,587 |  |  | — |  |  | — |  |  | 4,517,264 |  |  | 4,517,264 |
Federal funds purchased and securities sold under agreements to repurchase | 22,348 |  |  | — |  |  | 22,348 |  |  | — |  |  | 22,348 |
Other borrowings | 18,832 |  |  | — |  |  | 18,010 |  |  | — |  |  | 18,010 |
Subordinated notes and debentures | 648,976 |  |  | — |  |  | 654,661 |  |  | — |  |  | 654,661 |
Interest payable | 47,415 |  |  | — |  |  | 47,415 |  |  | — |  |  | 47,415 |
December 31, 2024 |  |  |  |  |  |  |  |  |
Financial assets: |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 687,377 |  |  | $ | 687,377 |  |  | $ | — |  |  | $ | — |  |  | $ | 687,377 |
Interest bearing balances due from banks - time | 100 |  |  | — |  |  | 100 |  |  | — |  |  | 100 |
Held-to-maturity securities, net | 3,636,636 |  |  | — |  |  | 2,949,951 |  |  | — |  |  | 2,949,951 |
Interest receivable | 123,243 |  |  | — |  |  | 123,243 |  |  | — |  |  | 123,243 |
Loans, net | 16,770,918 |  |  | — |  |  | — |  |  | 16,153,128 |  |  | 16,153,128 |
Financial liabilities: |  |  |  |  |  |  |  |  |
Noninterest bearing transaction accounts | 4,460,517 |  |  | — |  |  | 4,460,517 |  |  | — |  |  | 4,460,517 |
Interest bearing transaction accounts and savings deposits | 10,982,022 |  |  | — |  |  | 10,982,022 |  |  | — |  |  | 10,982,022 |
Time deposits | 6,443,211 |  |  | — |  |  | — |  |  | 6,429,309 |  |  | 6,429,309 |
Federal funds purchased and securities sold under agreements to repurchase | 37,109 |  |  | — |  |  | 37,109 |  |  | — |  |  | 37,109 |
Other borrowings | 745,372 |  |  | — |  |  | 743,940 |  |  | — |  |  | 743,940 |
Subordinated notes and debentures | 366,293 |  |  | — |  |  | 361,332 |  |  | — |  |  | 361,332 |
Interest payable | 67,111 |  |  | — |  |  | 67,111 |  |  | — |  |  | 67,111 |

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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