Derivative Financial Instruments - Remaining Contract Maturity of Fair Value of OTC Derivative Assets and Liabilities (Details) $ in Thousands	Nov. 30, 2024 USD ($)
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
0 – 12  Months	$ 537,119
1 – 5 Years	212,020
Greater Than 5 Years	63,395
Cross-Maturity Netting	(51,790)
Total OTC derivative assets, net of cross-maturity netting	760,744
Cross-product counterparty netting	(49,154)
Total OTC derivative assets included in Financial instruments owned	711,590
0 – 12 Months	450,344
1 – 5 Years	392,290
Greater Than 5 Years	448,070
Cross-Maturity Netting	(51,790)
Total OTC derivative liabilities, net of cross-maturity netting	1,238,914
Cross-product counterparty netting	(49,154)
Total OTC derivative liabilities included in Financial instruments sold, not yet purchased	1,189,760
Exchange traded derivative assets, with fair value	206,300
Exchange traded derivative liabilities, with fair value	46,600
Cash collateral received	400,100
Cash collateral pledged	526,000
Commodity swaps, options and forwards
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
0 – 12  Months	4,566
1 – 5 Years	0
Greater Than 5 Years	28,727
Cross-Maturity Netting	0
Total OTC derivative assets, net of cross-maturity netting	33,293
0 – 12 Months	1,376
1 – 5 Years	0
Greater Than 5 Years	0
Cross-Maturity Netting	0
Total OTC derivative liabilities, net of cross-maturity netting	1,376
Equity options and forwards
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
0 – 12  Months	176,159
1 – 5 Years	948
Greater Than 5 Years	0
Cross-Maturity Netting	(714)
Total OTC derivative assets, net of cross-maturity netting	176,393
0 – 12 Months	171,794
1 – 5 Years	177,950
Greater Than 5 Years	0
Cross-Maturity Netting	(714)
Total OTC derivative liabilities, net of cross-maturity netting	349,030
Credit default swaps
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
0 – 12 Months	1,408
1 – 5 Years	840
Greater Than 5 Years	9,106
Cross-Maturity Netting	0
Total OTC derivative liabilities, net of cross-maturity netting	11,354
Total return swaps
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
0 – 12  Months	196,636
1 – 5 Years	34,197
Greater Than 5 Years	418
Cross-Maturity Netting	(5,230)
Total OTC derivative assets, net of cross-maturity netting	226,021
0 – 12 Months	150,706
1 – 5 Years	76,092
Greater Than 5 Years	0
Cross-Maturity Netting	(5,230)
Total OTC derivative liabilities, net of cross-maturity netting	221,568
Foreign currency forwards, swaps and options
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
0 – 12  Months	92,163
1 – 5 Years	1,773
Greater Than 5 Years	0
Cross-Maturity Netting	0
Total OTC derivative assets, net of cross-maturity netting	93,936
0 – 12 Months	53,608
1 – 5 Years	1,073
Greater Than 5 Years	0
Cross-Maturity Netting	0
Total OTC derivative liabilities, net of cross-maturity netting	54,681
Fixed income forwards
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
0 – 12  Months	203
1 – 5 Years	0
Greater Than 5 Years	0
Cross-Maturity Netting	0
Total OTC derivative assets, net of cross-maturity netting	203
0 – 12 Months	21,997
1 – 5 Years	0
Greater Than 5 Years	0
Cross-Maturity Netting	0
Total OTC derivative liabilities, net of cross-maturity netting	21,997
Interest rate swaps, options and forwards
Remaining Contract Maturity Of Fair Value Of Over Counter Derivative Assets And Liabilities [Line Items]
0 – 12  Months	67,392
1 – 5 Years	175,102
Greater Than 5 Years	34,250
Cross-Maturity Netting	(45,846)
Total OTC derivative assets, net of cross-maturity netting	230,898
0 – 12 Months	49,455
1 – 5 Years	136,335
Greater Than 5 Years	438,964
Cross-Maturity Netting	(45,846)
Total OTC derivative liabilities, net of cross-maturity netting	$ 578,908