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Commitments and Contingencies - Financial instruments with off-Balance Sheet credit risk (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Commitments to extend credit | Credit card lines |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | $ 6,266,974 | $ 5,599,823
Commitments to extend credit | Commercial Lines of Credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | 4,422,977 | 3,971,331
Commitments to extend credit | Construction Lines of Credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | 1,126,310 | 1,131,824
Commitments to extend credit | Other consumer unused credit commitments |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | 275,462 | 260,121
Commercial letters of credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | 14,920 | 5,002
Standby letters of credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | 130,856 | 144,845
Commitments to originate or fund mortgage loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | $ 16,091 | $ 29,604

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Unused amount of commitments to extend credit to customers. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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