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Fair Value Measurements Narrative (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | $ 3,313,296 | $ 2,398,352
Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted average annual constant prepayment rate | 7.80% |
Weighted average discount rate | 9.50% |
Fair Value, Recurring [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | $ 3,313,296 | 2,398,352
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | 0 | 42,161
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | 3,313,296 | 2,356,191
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | 0 | 0
Fair Value, Recurring [Member] | Financial Institutions Subordinated Debt [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | 289,400 | 433,400
Fair Value, Recurring [Member] | Other Corporate Debt [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | 7,200 | 7,200
Fair Value, Recurring [Member] | Foreign Exchange Contract [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other financial liabilities | 500 | 500
Foreign Exchange Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other financial assets | 700 | 600
Forward Commitments [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other financial assets | 800 | 500
Other financial liabilities | 400 | 900
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Other financial assets | 136,000 | 157,100
Other financial liabilities | $ 202,400 | $ 245,600

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