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Fair Value - Unfunded Loan and Lease Commitments and Letters of Credit (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
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Unfunded loan and lease commitments and letters of credit |  |
Aggregate commitments to extend credit, standby letters of credit and commercial letters of credit | $ 6,500.0 | $ 6,500.0
Fair Value, Inputs, Level 3 [Member] |  |
Unfunded loan and lease commitments and letters of credit |  |
Aggregate commitments to extend credit, standby letters of credit and commercial letters of credit | 6,500.0 |
Estimated fair value of unfunded loan and lease commitments and letters of credit | $ 47.2 | $ 49.8

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- Definition The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-10 + Details
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- Definition The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References No definition available. + Details
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