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Investments in Securities and Fair Value Investments in Securities (Schedule of Variable Interest Entities) (Details) - Other Investments $ in Thousands	Dec. 31, 2024 USD ($)
Variable Interest Entity [Line Items]
Variable Interest Entity Nonconsolidated Carrying Amount	$ 11,698
Variable Interest Entity, Nonconsolidated, Estimated Fair Value	12,588
Variable Interest Entity, Reporting Entity Involvement, Maximum Potential Loss	16,056
Real estate LLCs or LPs
Variable Interest Entity [Line Items]
Variable Interest Entity Nonconsolidated Carrying Amount	10,514
Variable Interest Entity, Nonconsolidated, Estimated Fair Value	11,404
Variable Interest Entity, Reporting Entity Involvement, Maximum Potential Loss	14,653
Small business investment LLCs or LPs
Variable Interest Entity [Line Items]
Variable Interest Entity Nonconsolidated Carrying Amount	1,184
Variable Interest Entity, Nonconsolidated, Estimated Fair Value	1,184
Variable Interest Entity, Reporting Entity Involvement, Maximum Potential Loss	$ 1,403

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- Definition

Carrying amount of the assets in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary

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- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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