Related Party Transactions - Jefferies (Details) - USD ($)	3 Months Ended		6 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021	Nov. 30, 2021
Related Party Transaction [Line Items]
Payables-brokers, dealers and clearing organizations	$ 4,773,383,000		$ 4,773,383,000		$ 5,814,066,000
Financial instruments sold, not yet purchased	13,614,475,000		13,614,475,000		11,690,795,000
Floor brokerage and clearing fees	94,016,000	$ 76,617,000	177,977,000	$ 153,197,000
Corporate debt securities
Related Party Transaction [Line Items]
Financial instruments sold, not yet purchased	2,309,216,000		2,309,216,000		2,112,259,000
Jefferies | Broker-dealer payable to customer
Related Party Transaction [Line Items]
Customer account payables	900,000		900,000		500,000
Affiliated entity | Jefferies
Related Party Transaction [Line Items]
Charges to Jefferies for services provided	5,800,000	8,300,000	13,200,000	23,900,000
Charges from Jefferies for services received	2,900,000	8,500,000	8,000,000.0	18,400,000
Receivable from Jefferies	500,000		500,000		300,000
Payable to Jefferies	4,900,000		4,900,000		10,900,000
Accrued distributions payable	70,000,000		70,000,000
Tax receivable	80,100,000		80,100,000		130,600,000
Net gain (loss) on investments			0
Securities purchased from Jefferies		8,000,000.0		17,100,000
Securities sold to Jefferies		0		500,000
Payables-brokers, dealers and clearing organizations	600,000		600,000		700,000
Affiliated entity | Jefferies | Corporate debt securities
Related Party Transaction [Line Items]
Financial instruments sold, not yet purchased	3,000,000		3,000,000		2,300,000
Floor brokerage and clearing fees	100,000	(200,000)	300,000	300,000
Affiliated entity | Jefferies | Investment banking
Related Party Transaction [Line Items]
Charges to Jefferies for services provided	400,000	10,500,000	400,000	24,100,000
Affiliated entity | Jefferies | Commissions and other fees
Related Party Transaction [Line Items]
Charges to Jefferies for services provided	300,000	200,000	600,000	500,000
Affiliated entity | Jefferies | Distribution based on earnings
Related Party Transaction [Line Items]
Payments of distributions to affiliates			363,800,000
Affiliated entity | Jefferies | Payments on current tax receivables and payables
Related Party Transaction [Line Items]
Payments of distributions to affiliates			45,000,000
Affiliated entity | Subsidiary of Jefferies Financial Group Inc.
Related Party Transaction [Line Items]
Net gains on foreign exchange contracts		0		100,000
Affiliated entity | Monashee
Related Party Transaction [Line Items]
Net gain (loss) on investments	300,000	2,500,000	2,400,000	100,000
Investment in related party	8,900,000		8,900,000		$ 13,600,000
Affiliated entity | Oak Hill
Related Party Transaction [Line Items]
Investment in related party	4,400,000		4,400,000
Affiliated entity | Affiliate of Jefferies Financial Group Inc.
Related Party Transaction [Line Items]
Payments for rent and other expenses	$ 100,000	$ 200,000	$ 300,000	$ 400,000