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Fair Value Measurements Narrative (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | $ 2,418,868 | $ 2,646,767
Minimum |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Weighted average annual constant prepayment rate | 7.60% |
Weighted average discount rate | 9.00% |
Fair Value, Recurring [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | $ 2,418,868 | 2,646,767
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | 222,446 | 218,485
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
AFS, at estimated fair value | 2,196,422 | 2,428,282
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 | 421,500 | 415,400
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 | 7,000 | 6,900
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 | 1,100 | 600
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 | 1,300 | 700
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 | 1,000 | 200
Other financial liabilities | 0 | 200
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 | 227,800 | 166,600
Other financial liabilities | $ 372,500 | $ 296,300

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