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Commitments and Contingencies - Additional Information (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2026 | Dec. 31, 2025
Loss Contingencies [Line Items] |  |
Commitments to extend credit, cancelable | $ 1,800,000,000 | $ 1,420,000,000
Commitment losses | 0 | 0
Capital call lines |  |
Loss Contingencies [Line Items] |  |
Commitments to extend credit | 204,800,000 |
Commercial and industrial loans |  |
Loss Contingencies [Line Items] |  |
Commitments to extend credit | 590,962,000 | 519,135,000
Commercial and industrial loans | Maximum |  |
Loss Contingencies [Line Items] |  |
Commitments to extend credit | 350,000,000.0 |
Total commitments to extend credit |  |
Loss Contingencies [Line Items] |  |
Commitments to extend credit | 2,815,854,000 | 2,308,044,000
Increase (decrease) in unused commitment to extend credit | 507,800,000 |
Total commitments to extend credit | Commercial Construction Loans |  |
Loss Contingencies [Line Items] |  |
Increase (decrease) in unused commitment to extend credit | (26,600,000) |
CCBX sold receivable commitment |  |
Loss Contingencies [Line Items] |  |
Commitments to extend credit | 6,153,420,000 | $ 4,170,246,000
CCBX | Total commitments to extend credit | Credit cards |  |
Loss Contingencies [Line Items] |  |
Increase (decrease) in unused commitment to extend credit | 220,000,000.0 |
CCBX | Total commitments to extend credit | Residential real estate loans |  |
Loss Contingencies [Line Items] |  |
Increase (decrease) in unused commitment to extend credit | 101,200,000 |
CCBX | Total commitments to extend credit | Consumer and other loans: |  |
Loss Contingencies [Line Items] |  |
Increase (decrease) in unused commitment to extend credit | 94,600,000 |
CCBX | Total commitments to extend credit | Commercial And Industrial Capital Call Line Commitments |  |
Loss Contingencies [Line Items] |  |
Increase (decrease) in unused commitment to extend credit | $ 71,800,000 |

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