Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
	Jan. 13, 2023	May 31, 2023	May 31, 2022	[1]	May 31, 2023	May 31, 2022	[1]	Nov. 30, 2022
Related Party Transaction [Line Items]
Other assets		$ 3,627,699			$ 3,627,699			$ 3,595,985
Total revenues		1,651,182	$ 1,596,446		3,431,746	$ 3,509,261
Officers and Employees
Related Party Transaction [Line Items]
Other assets		$ 33,900			33,900			$ 17,700
Subsidiaries | Vitesse Energy
Related Party Transaction [Line Items]
Sale of subsidiary	$ 30,600
Related Party | Vitesse Energy
Related Party Transaction [Line Items]
Total revenues					$ 3,000

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