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Fair Value Disclosures - Quantitative Information about Significant Unobservable Inputs Used in Level 3 Fair Value Measurements (Detail)
$ in Thousands
6 Months Ended 12 Months Ended
May 31, 2019
$ / shares
Nov. 30, 2018
$ / shares
May 31, 2019
€ / shares
May 31, 2019
May 31, 2019
USD ($)
Nov. 30, 2018
€ / shares
Nov. 30, 2018
Nov. 30, 2018
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, at fair value | $         $ 16,095,884     $ 16,399,526
Derivative assets | $         323,443     130,610
Financial instruments sold, not yet purchased, at fair value | $         10,113,390     9,478,944
Derivative liabilities | $         554,243     1,127,651
Value of asset excluded from significant unobservable inputs | $         37,700     11,100
Value of liability excluded from significant unobservable inputs | $         900     500
Corporate equity securities                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments sold, not yet purchased, at fair value | $         2,669,887     1,686,515
Corporate debt securities                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments sold, not yet purchased, at fair value | $         1,920,135     1,506,140
CMBS                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments sold, not yet purchased, at fair value | $         724      
Loans                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments sold, not yet purchased, at fair value | $         1,533,769     1,378,006
Level 3                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative assets | $         8,414     5,922
Financial instruments sold, not yet purchased, at fair value | $         66,181     34,434
Derivative liabilities | $         55,863     27,536
Level 3 | Corporate equity securities                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, at fair value | $         53,000     43,664
Financial instruments sold, not yet purchased, at fair value | $         221     0
Level 3 | Non-exchange-traded securities | Price | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 3 1            
Level 3 | Non-exchange-traded securities | Price | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 85 75            
Level 3 | Non-exchange-traded securities | Price | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 55 12            
Level 3 | Non-exchange-traded securities | Underlying stock price | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 3              
Level 3 | Non-exchange-traded securities | Underlying stock price | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 13              
Level 3 | Non-exchange-traded securities | Underlying stock price | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 10              
Level 3 | Non-exchange-traded securities | Transaction level                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input   47            
Level 3 | Corporate debt securities                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, at fair value | $         7,429     9,484
Financial instruments sold, not yet purchased, at fair value | $         669     522
Level 3 | Corporate debt securities | Price                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 88              
Level 3 | Corporate debt securities | Transaction level                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input   80            
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       0.49     0.46  
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       0.32        
Level 3 | CDOs and CLOs                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, at fair value | $         16,195     25,815
Level 3 | CDOs and CLOs | Discounted cash flows | Discount rate/yield | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.11     0.11  
Level 3 | CDOs and CLOs | Discounted cash flows | Discount rate/yield | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.17     0.16  
Level 3 | CDOs and CLOs | Discounted cash flows | Discount rate/yield | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.13     0.14  
Level 3 | CDOs and CLOs | Discounted cash flows | Constant prepayment rate | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.10     0.10  
Level 3 | CDOs and CLOs | Discounted cash flows | Constant prepayment rate | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.20     0.20  
Level 3 | CDOs and CLOs | Discounted cash flows | Constant prepayment rate | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.16     0.18  
Level 3 | CDOs and CLOs | Discounted cash flows | Constant default rate | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.01     0.01  
Level 3 | CDOs and CLOs | Discounted cash flows | Constant default rate | Maximum                
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 | Discounted cash flows | Constant default rate | Weighted Average                
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 | Discounted cash flows | Loss severity | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.25     0.25  
Level 3 | CDOs and CLOs | Discounted cash flows | Loss severity | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.30     0.30  
Level 3 | CDOs and CLOs | Discounted cash flows | Loss severity | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.27     0.26  
Level 3 | CDOs and CLOs | Scenario analysis | Estimated recovery percentage                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.02     0.02  
Level 3 | RMBS                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, at fair value | $         17,266     19,603
Financial instruments owned, measurement input, term 7 years              
Level 3 | RMBS | Discount rate/yield                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.03        
Level 3 | RMBS | Cumulative loss rate                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.02        
Level 3 | RMBS | Discounted cash flows                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input, term   13 years            
Level 3 | RMBS | Discounted cash flows | Discount rate/yield                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input             0.03  
Level 3 | RMBS | Discounted cash flows | Loss severity                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input             0  
Level 3 | RMBS | Discounted cash flows | Cumulative loss rate                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input             0.04  
Level 3 | RMBS | Market approach | Price                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input   100            
Level 3 | CMBS                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, at fair value | $         12,530     9,444
Financial instruments sold, not yet purchased, at fair value | $         0      
Level 3 | CMBS | Discounted cash flows | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input, term 0 years 1 year            
Level 3 | CMBS | Discounted cash flows | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input, term 1 year 3 years            
Level 3 | CMBS | Discounted cash flows | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input, term 1 year 1 year            
Level 3 | CMBS | Discounted cash flows | Discount rate/yield | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.03     0.02  
Level 3 | CMBS | Discounted cash flows | Discount rate/yield | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.28     0.15  
Level 3 | CMBS | Discounted cash flows | Discount rate/yield | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.19     0.06  
Level 3 | CMBS | Discounted cash flows | Loss severity                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input             0.64  
Level 3 | CMBS | Discounted cash flows | Cumulative loss rate | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.08     0.08  
Level 3 | CMBS | Discounted cash flows | Cumulative loss rate | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.86     0.85  
Level 3 | CMBS | Discounted cash flows | Cumulative loss rate | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.32     0.45  
Level 3 | CMBS | Scenario analysis | Price                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input   49            
Level 3 | CMBS | Scenario analysis | Price | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 39              
Level 3 | CMBS | Scenario analysis | Price | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 60              
Level 3 | CMBS | Scenario analysis | Price | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 50              
Level 3 | CMBS | Scenario analysis | Estimated recovery percentage                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input             0.26  
Level 3 | CMBS | Scenario analysis | Estimated recovery percentage | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.12        
Level 3 | CMBS | Scenario analysis | Estimated recovery percentage | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.83        
Level 3 | CMBS | Scenario analysis | Estimated recovery percentage | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.47        
Level 3 | Other ABS                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, at fair value | $         43,185     53,175
Level 3 | Other ABS | Discounted cash flows | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input, term 1 year 1 year            
Level 3 | Other ABS | Discounted cash flows | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input, term 2 years 2 years            
Level 3 | Other ABS | Discounted cash flows | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input, term 1 year 1 year            
Level 3 | Other ABS | Discounted cash flows | Discount rate/yield | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.05     0.06  
Level 3 | Other ABS | Discounted cash flows | Discount rate/yield | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.12     0.12  
Level 3 | Other ABS | Discounted cash flows | Discount rate/yield | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.12     0.08  
Level 3 | Other ABS | Discounted cash flows | Cumulative loss rate | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.11     0.12  
Level 3 | Other ABS | Discounted cash flows | Cumulative loss rate | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.31     0.30  
Level 3 | Other ABS | Discounted cash flows | Cumulative loss rate | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.20     0.22  
Level 3 | Other ABS | Market approach | Price                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 100 100            
Level 3 | Loans and other receivables                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, at fair value | $         98,484     46,078
Level 3 | Loans and other receivables | Scenario analysis | Estimated recovery percentage | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.13     0.13  
Level 3 | Loans and other receivables | Scenario analysis | Estimated recovery percentage | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       1.17     1.17  
Level 3 | Loans and other receivables | Scenario analysis | Estimated recovery percentage | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       1.05     1.05  
Level 3 | Loans and other receivables | Market approach | Price | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 50 50            
Level 3 | Loans and other receivables | Market approach | Price | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 101 100            
Level 3 | Loans and other receivables | Market approach | Price | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 91 96            
Level 3 | Loans and other receivables | Market approach | Comparable price                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 33              
Level 3 | Loans and other receivables | Market approach | Estimated recovery percentage                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.01        
Level 3 | Derivatives                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative assets | $         8,414     4,602
Derivative liabilities | $               27,536
Level 3 | Derivatives | Interest rate swaps | Basis points upfront | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative asset, measurement input       0        
Level 3 | Derivatives | Interest rate swaps | Basis points upfront | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative asset, measurement input       12        
Level 3 | Derivatives | Interest rate swaps | Basis points upfront | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative asset, measurement input       5        
Level 3 | Derivatives | Interest rate swaps | Market approach | Price                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative liability, measurement input   20            
Level 3 | Derivatives | Interest rate swaps | Market approach | Basis points upfront | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative liability, measurement input       0        
Level 3 | Derivatives | Interest rate swaps | Market approach | Basis points upfront | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative liability, measurement input       21        
Level 3 | Derivatives | Interest rate swaps | Market approach | Basis points upfront | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative liability, measurement input       12        
Level 3 | Derivatives | Equity options | Option model/default rate | Default probability                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative liability, measurement input             0  
Level 3 | Derivatives | Equity options | Volatility benchmarking | Volatility | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative liability, measurement input       0.03     0.39  
Level 3 | Derivatives | Equity options | Volatility benchmarking | Volatility | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative liability, measurement input       0.63     0.62  
Level 3 | Derivatives | Equity options | Volatility benchmarking | Volatility | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative liability, measurement input       0.46     0.50  
Level 3 | Derivatives | Total return swaps | Price                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative asset, measurement input   97            
Level 3 | Derivatives | Total return swaps | Market approach | Price                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Derivative liability, measurement input   97            
Level 3 | Investments at fair value                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, at fair value | $         72,490     113,831
Level 3 | Private equity securities | Scenario analysis | Discount rate/yield                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0.20     0.20  
Level 3 | Private equity securities | Scenario analysis | Revenue growth                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input       0     0  
Level 3 | Private equity securities | Market approach | Price | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 169 3            
Level 3 | Private equity securities | Market approach | Price | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 250 250            
Level 3 | Private equity securities | Market approach | Price | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input 229 108            
Level 3 | Private equity securities | Market approach | Transaction level                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, measurement input   169            
Level 3 | Securities purchased under agreements to resell                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments owned, at fair value | $         25,000      
Securities purchased under agreements to resell, measurement input, term 2 years              
Level 3 | Securities purchased under agreements to resell | Spread to 6 month LIBOR                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Securities purchased under agreements to resell, measurement input 500              
Level 3 | Loans                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments sold, not yet purchased, at fair value | $         9,428     6,376
Level 3 | Loans | Price | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Debt instrument, measurement input 50 50            
Level 3 | Loans | Price | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Debt instrument, measurement input 80 101            
Level 3 | Loans | Price | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Debt instrument, measurement input 66 74            
Level 3 | Long-term debt                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Financial instruments sold, not yet purchased, at fair value | $         $ 236,562     $ 200,745
Level 3 | Long-term debt | Price | Minimum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Long-term debt, measurement input 83 78 78     68    
Level 3 | Long-term debt | Price | Maximum                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Long-term debt, measurement input 100 94 107     110    
Level 3 | Long-term debt | Price | Weighted Average                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Long-term debt, measurement input 92 86 94     96