Investments - Loans and Investments In Related Parties (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2022	Nov. 30, 2021		Nov. 30, 2020
Equity Method Investments and Joint Ventures [Abstract]
Investments in and loans to related parties	$ 1,426,817	$ 1,587,409	[1]
Income (loss) related to associated companies	$ (36,300)	$ 149,900		$ (75,200)

[1] See Note 1 for a description of financial statement presentation changes made as a result of our Merger with Jefferies Group.