v3.26.3
Fair Value Disclosures - Quantitative Information about Significant Unobservable Inputs Used in Level 3 Fair Value Measurements (Details)
9 Months Ended 12 Months Ended
Aug. 31, 2026
USD ($)
$ / shares
Nov. 30, 2025
USD ($)
$ / shares
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative liability | $ $ 1,242,427,000 $ 1,490,017,000
Other secured financings | $ 413,121,000 425,964,000
Long-term debt | $ 3,941,920,000 3,734,843,000
Level 3    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative liability | $ 19,394,000 45,953,000
Other secured financings | $ 10,718,000 13,454,000
Long-term debt | $ 1,021,303,000 1,063,358,000
Level 3 | Non-exchange-traded securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned | $ 243,389,000 218,853,000
Level 3 | Corporate debt securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned | $ $ 65,825,000 37,578,000
Derivative liability | $   $ 3,720,000
Level 3 | Corporate debt securities | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.17  
Level 3 | Corporate debt securities | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.06 0.30
Financial instruments sold, not yet purchased, measurement input   0.30
Level 3 | CDOs and CLOs    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned | $ $ 69,063,000 $ 25,824,000
Level 3 | CDOs and CLOs | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input   0.17
Level 3 | CDOs and CLOs | Constant prepayment rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input   0.20
Level 3 | CDOs and CLOs | Constant default rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.02 0.02
Level 3 | CDOs and CLOs | Loss severity    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.30 0.30
Level 3 | Residential mortgage-backed securities | Discounted Cash Flow    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned | $ $ 4,679,000 $ 6,663,000
Level 3 | Residential mortgage-backed securities | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.15 0.15
Level 3 | Residential mortgage-backed securities | Constant prepayment rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.10 0.12
Level 3 | Residential mortgage-backed securities | Constant default rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.01 0.003
Level 3 | Residential mortgage-backed securities | Loss severity    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.50 0.20
Level 3 | Other ABS | Discounted Cash Flows, Market Approach, Scenario Analysis    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned | $ $ 144,953,000 $ 129,693,000
Level 3 | Other ABS | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input   0.16
Level 3 | Other ABS | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input   0.66
Level 3 | Other ABS | Cumulative loss rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input   0.16
Level 3 | Loans and other receivables    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned | $ 98,321,000 $ 127,720,000
Level 3 | Investments at fair value | Market Approach    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned | $ $ 211,908,000 $ 157,162,000
Level 3 | Private equity securities | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.28 0.28
Level 3 | Private equity securities | Estimated revenue    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input | $ 29,990,436 29,818,082
Level 3 | Equity options    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative liability | $ $ 17,242,000 $ 6,094,000
Level 3 | Equity options | Volatility    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative asset, measurement input 0.94 0.34
Level 3 | Loans    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative liability | $   $ 9,757,000
Level 3 | Loans | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments sold, not yet purchased, measurement input   0.30
Level 3 | Other secured financings: | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financings, measurement input 120  
Level 3 | Long-term debt    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt | $ $ 1,021,303,000 $ 1,063,358,000
Minimum | Level 3 | Non-exchange-traded securities | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0 0
Minimum | Level 3 | Non-exchange-traded securities | Volatility    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.28 0.44
Minimum | Level 3 | Corporate debt securities | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 67 49
Minimum | Level 3 | Corporate debt securities | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input   0.18
Minimum | Level 3 | CDOs and CLOs | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 100 98
Minimum | Level 3 | CDOs and CLOs | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.13  
Minimum | Level 3 | CDOs and CLOs | Constant prepayment rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.15  
Minimum | Level 3 | Other ABS | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 116 116
Minimum | Level 3 | Other ABS | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.15  
Minimum | Level 3 | Other ABS | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.35  
Minimum | Level 3 | Other ABS | Cumulative loss rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.16  
Minimum | Level 3 | Other ABS | Duration (years)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input, term 10 months 24 days 1 year 1 month 6 days
Minimum | Level 3 | Loans and other receivables | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 4 67
Minimum | Level 3 | Loans and other receivables | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.06 0.08
Minimum | Level 3 | Interest rate swaps | Basis points upfront    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative liability, measurement input 7  
Minimum | Level 3 | Private equity securities | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0 0
Minimum | Level 3 | Equity options | Volatility    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative liability, measurement input 0.42 0.34
Minimum | Level 3 | Equity options | Borrow rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative asset, measurement input 0.04  
Minimum | Level 3 | Embedded options | Basis points upfront    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative asset, measurement input   0.4
Derivative liability, measurement input   0
Minimum | Level 3 | Loans | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments sold, not yet purchased, measurement input   100
Minimum | Level 3 | Other secured financings: | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financings, measurement input   114
Minimum | Level 3 | Other secured financings: | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financings, measurement input 0.29 0.74
Minimum | Level 3 | Long-term debt | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 60 72
Maximum | Level 3 | Non-exchange-traded securities | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 486 486
Maximum | Level 3 | Non-exchange-traded securities | Volatility    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.32 0.48
Maximum | Level 3 | Corporate debt securities | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 125 121
Maximum | Level 3 | Corporate debt securities | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input   0.20
Maximum | Level 3 | CDOs and CLOs | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 116 100
Maximum | Level 3 | CDOs and CLOs | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.16  
Maximum | Level 3 | CDOs and CLOs | Constant prepayment rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.20  
Maximum | Level 3 | Other ABS | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 136 133
Maximum | Level 3 | Other ABS | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.20  
Maximum | Level 3 | Other ABS | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.41  
Maximum | Level 3 | Other ABS | Cumulative loss rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.17  
Maximum | Level 3 | Other ABS | Duration (years)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input, term 1 year 2 months 12 days 1 year 2 months 12 days
Maximum | Level 3 | Loans and other receivables | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 116 129
Maximum | Level 3 | Loans and other receivables | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 1 1
Maximum | Level 3 | Interest rate swaps | Basis points upfront    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative liability, measurement input 24  
Maximum | Level 3 | Private equity securities | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 170,363 27,989
Maximum | Level 3 | Equity options | Volatility    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative liability, measurement input 0.94 0.61
Maximum | Level 3 | Equity options | Borrow rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative asset, measurement input 0.06  
Maximum | Level 3 | Embedded options | Basis points upfront    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative asset, measurement input   0.5
Derivative liability, measurement input   21
Maximum | Level 3 | Loans | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments sold, not yet purchased, measurement input   129
Maximum | Level 3 | Other secured financings: | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financings, measurement input   117
Maximum | Level 3 | Other secured financings: | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financings, measurement input 1 1
Maximum | Level 3 | Long-term debt | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 119 120
Weighted Average | Level 3 | Non-exchange-traded securities | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 81 85
Weighted Average | Level 3 | Non-exchange-traded securities | Volatility    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.31 0.47
Weighted Average | Level 3 | Corporate debt securities | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 94 72
Weighted Average | Level 3 | Corporate debt securities | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input   0.19
Weighted Average | Level 3 | CDOs and CLOs | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 107 99
Weighted Average | Level 3 | CDOs and CLOs | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.14  
Weighted Average | Level 3 | CDOs and CLOs | Constant prepayment rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.17  
Weighted Average | Level 3 | Other ABS | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 131 130
Weighted Average | Level 3 | Other ABS | Discount rate/yield    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.16  
Weighted Average | Level 3 | Other ABS | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.36  
Weighted Average | Level 3 | Other ABS | Cumulative loss rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.16  
Weighted Average | Level 3 | Other ABS | Duration (years)    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input, term 1 year 1 month 6 days 1 year 1 month 6 days
Weighted Average | Level 3 | Loans and other receivables | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 93 97
Weighted Average | Level 3 | Loans and other receivables | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 0.58 0.35
Weighted Average | Level 3 | Interest rate swaps | Basis points upfront    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative liability, measurement input 15  
Weighted Average | Level 3 | Private equity securities | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments owned, measurement input 6,083 2,722
Weighted Average | Level 3 | Equity options | Volatility    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative liability, measurement input 0.74 0.58
Weighted Average | Level 3 | Equity options | Borrow rate    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative asset, measurement input 0.04  
Weighted Average | Level 3 | Embedded options | Basis points upfront    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative asset, measurement input   0.5
Derivative liability, measurement input   13
Weighted Average | Level 3 | Loans | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Financial instruments sold, not yet purchased, measurement input   117
Weighted Average | Level 3 | Other secured financings: | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financings, measurement input   115
Weighted Average | Level 3 | Other secured financings: | Estimated recovery percentage    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financings, measurement input 0.72 0.96
Weighted Average | Level 3 | Long-term debt | Price    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Long-term debt, measurement input 98 101