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Investments In Securities and Fair Value (Schedule of Variable Interest Entities) (Details) - Other investments $ in Thousands | Sep. 30, 2023 USD ($)
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Variable Interest Entity, Not Primary Beneficiary [Line Items] |
Carrying Value | $ 13,644
Estimated Fair Value | 15,676
Maximum Potential Loss (a) | 18,738
Real Estate LLCs or LPs |
Variable Interest Entity, Not Primary Beneficiary [Line Items] |
Carrying Value | 4,346
Estimated Fair Value | 4,762
Maximum Potential Loss (a) | 5,658
Small Business Investment LPs |
Variable Interest Entity, Not Primary Beneficiary [Line Items] |
Carrying Value | 9,298
Estimated Fair Value | 10,914
Maximum Potential Loss (a) | $ 13,080

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