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Investments - JCP Fund V - Narrative (Details) - USD ($)
$ in Thousands
Nov. 30, 2024
Jul. 31, 2024
Nov. 30, 2023
Schedule of Equity Method Investments [Line Items]      
Financial instruments owned $ 24,138,274   $ 21,747,473
Jefferies Capital Partners V L.P.      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 11.00%    
SBI USA Fund L.P.      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 50.00%    
JCP Fund V      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 35.10%    
Financial instruments owned $ 2,900   2,200
Equity investments 85,000   85,000
Unfunded portion of equity commitment to subsidiary $ 8,700   $ 8,700
Hildene Insurance Holdings, LLC      
Schedule of Equity Method Investments [Line Items]      
Ownership percentage 9.26%    
Equity investments   $ 25,000