Revenues from Contracts with Customers - Components of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2025	Feb. 29, 2024
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	$ 1,144,426	$ 1,034,833
Revenues	2,472,864	2,551,942
Investment banking
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	725,661	679,065
Revenues	729,510	679,065
Commissions and other fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	287,965	245,543
Revenues	288,300	245,543
Asset management fees
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	45,808	29,361
Revenues	85,408	50,372
Real estate revenues
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	11,081	3,149
Internet connection and broadband revenues
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	57,804	63,616
Internet connection and broadband revenues | Revision of Prior Period, Error Correction, Adjustment
Disaggregation of Revenue [Line Items]
Revenues not from contracts with customers		63,600
Other contracts with customers
Disaggregation of Revenue [Line Items]
Revenues from contracts with customers	16,107	14,099
Revenues	117,245	116,737
Principal transactions
Disaggregation of Revenue [Line Items]
Revenues not from contracts with customers	407,230	640,736
Revenues	407,230	640,736
Revenues from strategic affiliates
Disaggregation of Revenue [Line Items]
Revenues not from contracts with customers	43,449	21,011
Interest
Disaggregation of Revenue [Line Items]
Revenues not from contracts with customers	845,171	819,489
Revenues	845,171	819,489
Other
Disaggregation of Revenue [Line Items]
Revenues not from contracts with customers	$ 32,588	35,873
Other | Revision of Prior Period, Error Correction, Adjustment
Disaggregation of Revenue [Line Items]
Revenues not from contracts with customers		$ (63,600)