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Loans and Allowance for Credit Losses - Schedule of Categories of Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | $ 17,111,096 | $ 17,005,937
Consumer: |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 299,997 | 308,994
Consumer: | Credit cards |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 176,166 | 181,675
Consumer: | Other consumer |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 123,831 | 127,319
Real Estate |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 13,371,707 | 13,391,531
Real Estate | Construction and development |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 2,784,578 | 2,789,249
Real Estate | Single family residential |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 2,625,717 | 2,689,946
Real Estate | Other commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 7,961,412 | 7,912,336
Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 2,773,585 | 2,695,329
Commercial | Commercial |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 2,440,507 | 2,434,175
Commercial | Agricultural |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | 333,078 | 261,154
Other |  |
Loans and Leases Receivable Disclosure [Line Items] |  |
Loans | $ 665,807 | $ 610,083

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