Investments - Jefferies Finance - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2025	Nov. 30, 2024
Guarantor Obligations [Line Items]
Other assets	$ 3,294,571	$ 3,072,302
Payables	(4,122,388)	(4,073,975)
Jefferies Finance
Guarantor Obligations [Line Items]
Equity commitment	750,000
Total committed equity capitalization of JFIN	1,500,000
Unfunded portion of equity commitment to subsidiary	$ 15,400
Extension period	1 year
Termination notice period	60 days
Committed line of credit facility amount	$ 500,000
Loan commitment	250,000
Jefferies Finance | Corporate Joint Venture
Guarantor Obligations [Line Items]
Other assets	$ 2,500	1,900
Payables		$ (13,700)
Jefferies Finance | Jefferies Finance
Guarantor Obligations [Line Items]
Ownership percentage	50.00%