Collateralized Transactions - Summary of Repurchase Agreements and Securities Borrowing and Lending Arrangements (Details) - USD ($) $ in Thousands	Nov. 30, 2020	Nov. 30, 2019
Securities borrowing arrangements
Gross Amounts	$ 6,934,762	$ 7,624,642
Netting in Consolidated Statement of Financial Condition	0	0
Net Amounts in Consolidated Statement of Financial Condition	6,934,762	7,624,642
Additional amounts available for setoff	(395,342)	(361,394)
Available collateral	(1,706,046)	(1,479,433)
Net amount	4,833,374	5,783,815
Reverse repurchase agreements
Gross Amounts	11,939,773	15,551,845
Netting in Consolidated Statement of Financial Condition	(6,843,004)	(11,252,247)
Net Amounts in Consolidated Statement of Financial Condition	5,096,769	4,299,598
Additional amounts available for setoff	(412,327)	(291,316)
Available collateral	(4,578,560)	(3,929,977)
Net amount	105,882	78,305
Securities lending arrangements
Gross Amounts	1,810,748	1,525,140
Netting in Consolidated Statement of Financial Condition	0	0
Net Amounts in Consolidated Statement of Financial Condition	1,810,748	1,525,140
Additional amounts available for setoff	(395,342)	(361,394)
Available collateral	(1,397,550)	(970,799)
Net amount	17,856	192,947
Repurchase agreements
Gross Amounts	15,159,273	18,756,917
Netting in Consolidated Statement of Financial Condition	(6,843,004)	(11,252,247)
Net Amounts in Consolidated Statement of Financial Condition	8,316,269	7,504,670
Additional amounts available for setoff	(412,327)	(291,316)
Available collateral	(7,122,422)	(6,663,807)
Net amount	781,520	549,547
Securities borrowing arrangements	4,757,800	5,683,400
Securities borrowing arrangements, collateral	4,617,000	5,523,600
Securities borrowing arrangements, repurchase agreements	720,000	439,700
Securities borrowing arrangements, repurchase agreements, pledged securities collateral	733,900	447,500
Obligation to return securities received as collateral, at fair value
Securities lending arrangements
Gross Amounts	7,517	9,500
Netting in Consolidated Statement of Financial Condition	0	0
Net Amounts in Consolidated Statement of Financial Condition	7,517	9,500
Additional amounts available for setoff	0	0
Available collateral	0	0
Net amount	7,517	9,500
Securities received as collateral, at fair value
Securities borrowing arrangements
Gross Amounts	7,517	9,500
Netting in Consolidated Statement of Financial Condition	0	0
Net Amounts in Consolidated Statement of Financial Condition	7,517	9,500
Additional amounts available for setoff	0	0
Available collateral	0	0
Net amount	$ 7,517	$ 9,500