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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
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.

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- Definition

Unused amount of commitments to extend credit to customers.

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No definition available.

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