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Parent Company Financial Information - Schedule of Parent Company Information Condensed Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Assets: |  |  |  |
Cash and due from banks | $ 370,748 | $ 388,060 |  |
Intercompany debt securities |  | 150,000 |  |
Other assets | 2,286,079 | 2,157,459 |  |
Total assets | 84,073,663 | 79,025,073 |  |
Liabilities and stockholders’ equity: |  |  |  |
Total liabilities | 74,581,427 | 69,891,859 |  |
Stockholders’ equity | 9,492,236 | 9,133,214 | $ 8,689,996 | $ 8,056,186
Total liabilities and stockholders’ equity | 84,073,663 | 79,025,073 |  |
Parent Company |  |  |  |
Assets: |  |  |  |
Cash and due from banks | 138,993 | 456,166 |  |
Intercompany debt securities | 250,000 |  |  |
Investment in subsidiaries | 9,774,083 | 9,377,808 |  |
Alternative investments | 86,722 | 71,959 |  |
Total assets | 10,258,270 | 10,063,895 |  |
Liabilities and stockholders’ equity: |  |  |  |
Senior notes | 316,206 | 321,191 |  |
Subordinated notes | 345,928 | 510,674 |  |
Junior subordinated debt | 77,320 | 77,320 |  |
Accrued interest payable | 9,585 | 5,007 |  |
Total liabilities | 766,034 | 930,681 |  |
Stockholders’ equity | 9,492,236 | 9,133,214 |  |
Total liabilities and stockholders’ equity | 10,258,270 | 10,063,895 |  |
Parent Company | Subsidiaries |  |  |  |
Assets: |  |  |  |
Other assets | 499 | 0 |  |
Liabilities and stockholders’ equity: |  |  |  |
Other liabilities | 0 | 10,613 |  |
Parent Company | Nonrelated Party |  |  |  |
Assets: |  |  |  |
Other assets | 7,973 | 7,962 |  |
Liabilities and stockholders’ equity: |  |  |  |
Other liabilities | $ 16,995 | $ 5,876 |  |

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