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Commitments and Contingencies - Schedule of Loan Commitments and Letters of Credit (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Loss Contingencies [Line Items] |  |
Carry amount included in other assets | $ 683,022 | $ 672,803
Permanent and short-term construction loans and letter of credit unfunded commitments | 233,524 | 205,855
Funded portion of permanent and short-term loans and letters of credit | 171,160 | 229,668
Future funding commitment amount | 348,300 | 358,500
Letters of credit |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 400,977 | 340,385
Contractual amount net of risk participations | 15,600 | 16,800
Commitments to fund commercial and industrial loans |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 9,613,063 | 9,956,797
Commitments to fund commercial real estate, construction, and land development loans |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 2,184,942 | 2,135,638
Commitments under home equity lines of credit |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 2,112,986 | 2,119,616
Unused credit card lines |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 441,495 | 446,800
Other loan commitments |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 529,552 | 621,659
Total letters of credit and unfunded lending commitments |  |
Loss Contingencies [Line Items] |  |
Total letters of credit and unfunded lending commitments | 15,283,015 | 15,620,895
Permanent and Short-Term Construction Loans and Letter of Credit Commitments |  |
Loss Contingencies [Line Items] |  |
Contractual amount net of risk participations | 12,000 | 16,000
Funded Portion of Permanent and Short-Term Loans and Letters of Credit |  |
Loss Contingencies [Line Items] |  |
Contractual amount net of risk participations | $ 15,800 | $ 16,200

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