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Commitments and Contingencies - Financial instruments with off-Balance Sheet credit risk (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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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 | $ 5,582,089 | $ 6,108,939
Commitments to extend credit | Commercial Lines of Credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | 3,874,209 | 3,626,269
Commitments to extend credit | Construction Lines of Credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | 1,234,365 | 1,287,679
Commitments to extend credit | Other consumer unused credit commitments |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | 261,470 | 256,610
Commercial letters of credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | 2,157 | 1,404
Standby letters of credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | 123,685 | 80,889
Commitments to originate or fund mortgage loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Unused commitments to extend credit | $ 23,217 | $ 32,968

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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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