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Parent Company Condensed Financial Statements - Schedule of Condensed Statement of Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Statement of income |  |  |
Compensation and employee benefits | $ 618,753 | $ 550,734 | $ 508,538
Other expense (income) | 165,039 | 148,301 | 136,305
Income tax benefit | (400,272) | (316,275) | (298,609)
NET INCOME | 1,325,188 | 1,165,586 | 1,161,161
Parent Company |  |  |
Statement of income |  |  |
Other investment income (losses) | 2,115 | (954) | (2,738)
Other income | 714 | 31 | 0
Total income | 752,895 | 539,204 | 701,584
Interest expense on long-term debt | 2,527 | 4,507 | 10,889
Compensation and employee benefits | 11,132 | 7,283 | 7,204
Other expense (income) | 1,850 | 1,839 | (1,086)
Total expense | 15,509 | 13,629 | 17,007
Income before income tax benefit and equity in undistributed income of subsidiaries | 737,386 | 525,575 | 684,577
Income tax benefit | 3,510 | 4,143 | 5,844
Undistributed earnings of subsidiaries, primarily bank | 584,292 | 635,868 | 470,740
NET INCOME | 1,325,188 | 1,165,586 | 1,161,161
Parent Company | Other investment income (losses) |  |  |
Statement of income |  |  |
Other noninterest recovery | 1,000 |  |
Parent Company | Other Noninterest Expense |  |  |
Statement of income |  |  |
Other noninterest recovery | 307 |  | 3,000
Parent Company | Bank |  |  |
Statement of income |  |  |
Dividends from subsidiaries | 750,000 | 540,000 | 704,000
Parent Company | Nonbank |  |  |
Statement of income |  |  |
Dividends from subsidiaries | $ 66 | $ 127 | $ 322

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