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Commitments and Contingencies Outstanding Commitments to Extend Credit and Letters of Credit (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Commitments to Extend Credit [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Valuation allowances and reserves, balance | $ 8,861,986 | $ 8,828,595
Standby Letters of Credit [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Valuation allowances and reserves, balance | 295,973 | 279,309
Commercial Letters of Credit [Member] |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Valuation allowances and reserves, balance | $ 36,449 | $ 48,993

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