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Fair Value Disclosures - Quantitative Information about Significant Unobservable Inputs Used in Level 3 Fair Value Measurements (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Feb. 28, 2021
USD ($)
Nov. 30, 2020
USD ($)
Feb. 28, 2021
$ / shares
Feb. 28, 2021
Feb. 28, 2021
€ / shares
Nov. 30, 2020
$ / shares
Nov. 30, 2020
Nov. 30, 2020
€ / shares
Nov. 30, 2020
£ / shares
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned $ 17,553,054 $ 16,730,068              
Financial instruments sold, not yet purchased 12,361,542 10,017,522              
Other secured financings 2,168 1,543              
Long-term debt 1,784,157 1,712,245              
Value of asset excluded from significant unobservable inputs 2,500 17,300              
Value of liability excluded from significant unobservable inputs   800              
Corporate debt securities                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 3,458,605 2,977,347              
Financial instruments sold, not yet purchased 1,826,029 1,237,772              
CDOs and CLOs                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 117,548 74,668              
RMBS                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 1,902,515 1,122,675              
Financial instruments sold, not yet purchased   477              
CMBS                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 39,684 738,294              
Financial instruments sold, not yet purchased 35 35              
Other ABS                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 124,550 183,606              
Loans and other receivables                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 3,178,972 2,687,788              
Corporate equity securities                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 2,829,205 2,465,396              
Financial instruments sold, not yet purchased 2,130,512 2,059,921              
Loans                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments sold, not yet purchased 2,341,222 1,793,081              
Level 3                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 364,864 379,108              
Derivative assets   19,951              
Financial instruments sold, not yet purchased 365,868 68,940              
Derivative liability   46,971              
Other secured financings 2,168                
Long-term debt 723,115 676,028              
Level 3 | Scenario analysis                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Other secured financings   1,543              
Level 3 | Volatility benchmarking and market approach                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Derivative assets 38,014                
Derivative liability 344,903                
Level 3 | Non-exchange-traded securities                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 83,278 75,409              
Level 3 | Non-exchange-traded securities | Market approach | Price | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input | $ / shares     1     1      
Level 3 | Non-exchange-traded securities | Market approach | Price | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input | $ / shares     213     213      
Level 3 | Non-exchange-traded securities | Market approach | Price | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input | $ / shares     76     86      
Level 3 | Non-exchange-traded securities | Market approach | EBITDA multiple                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input | $ / shares     8.0            
Level 3 | Non-exchange-traded securities | Market approach | EBITDA multiple | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input | $ / shares           4.0      
Level 3 | Non-exchange-traded securities | Market approach | EBITDA multiple | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input | $ / shares           8.0      
Level 3 | Non-exchange-traded securities | Market approach | EBITDA multiple | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input | $ / shares           5.7      
Level 3 | Corporate debt securities                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 6,811 23,146              
Financial instruments sold, not yet purchased 1,571 141              
Level 3 | Corporate debt securities | Market approach and scenario analysis                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned   23,146              
Level 3 | Corporate debt securities | Market approach | Estimated recovery percentage                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input             69    
Level 3 | Corporate debt securities | Scenario analysis                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments sold, not yet purchased   141              
Level 3 | Corporate debt securities | Scenario analysis | Estimated recovery percentage                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments sold, not yet purchased, measurement input       0.20     0.20    
Level 3 | Corporate debt securities | Scenario analysis | Estimated recovery percentage | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input     0.20           0.20
Level 3 | Corporate debt securities | Scenario analysis | Estimated recovery percentage | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input       0.44     0.44    
Level 3 | Corporate debt securities | Scenario analysis | Estimated recovery percentage | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input       0.30     0.30    
Level 3 | CDOs and CLOs                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 25,894 10,513              
Level 3 | CDOs and CLOs | Discounted cash flows                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 24,806                
Level 3 | CDOs and CLOs | Discounted cash flows | 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 | Discounted cash flows | Constant prepayment rate | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input       0.08          
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          
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       0.19          
Level 3 | CDOs and CLOs | Discounted cash flows | 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 | Discounted cash flows | Discount rate/yield | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input       0.04     0.14    
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       0.21     0.28    
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       0.16     0.20    
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       0.35     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       0.26     0.26    
Level 3 | RMBS                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned $ 21,692 21,826              
Financial instruments sold, not yet purchased   $ 0              
Level 3 | RMBS | Discounted cash flows | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input, term 3 years 2 years              
Level 3 | RMBS | Discounted cash flows | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input, term 5 years 6 months 12 years 10 months 24 days              
Level 3 | RMBS | Discounted cash flows | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input, term 4 years 10 months 24 days 5 years 1 month 6 days              
Level 3 | RMBS | 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     0.03    
Level 3 | RMBS | Discounted cash flows | Discount rate/yield | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input       0.04     0.12    
Level 3 | RMBS | 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       0.03     0.04    
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       0.35          
Level 3 | RMBS | Discounted cash flows | Loss severity | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input             0.35    
Level 3 | RMBS | Discounted cash flows | Loss severity | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input             0.50    
Level 3 | RMBS | Discounted cash flows | Loss severity | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input             0.36    
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       0.03          
Level 3 | RMBS | Discounted cash flows | Cumulative loss rate | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input             0.02    
Level 3 | RMBS | Discounted cash flows | Cumulative loss rate | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input             0.03    
Level 3 | RMBS | 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             0.03    
Level 3 | CMBS                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned $ 2,671 $ 2,003              
Financial instruments sold, not yet purchased $ 35 35              
Level 3 | CMBS | Discounted cash flows                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input, term 2 months 12 days                
Level 3 | CMBS | Discounted cash flows | Discount rate/yield                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input       0.16          
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       0.65          
Level 3 | CMBS | Discounted cash flows | Cumulative loss rate                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input       0.10          
Level 3 | Other ABS                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned $ 60,594 $ 79,995              
Level 3 | Other ABS | Market approach | Price                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input | $ / shares     100     100      
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       0.9          
Financial instruments owned, measurement input, term   2 months 12 days              
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       2.0          
Financial instruments owned, measurement input, term   2 years 1 month 6 days              
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       1.5          
Financial instruments owned, measurement input, term   1 year 3 months 18 days              
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       0.03     0.01    
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       0.14     0.16    
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       0.09     0.09    
Level 3 | Other ABS | Discounted cash flows | Loss severity | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input             0.50    
Level 3 | Other ABS | Discounted cash flows | Loss severity | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input             0.85    
Level 3 | Other ABS | Discounted cash flows | Loss severity | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input             0.54    
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       0.08     0.01    
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       0.19     0.28    
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       0.13     0.11    
Level 3 | Other ABS | Discounted cash flows and market approach                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 60,594 $ 67,816              
Level 3 | Loans and other receivables                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 79,055 77,042              
Level 3 | Loans and other receivables | Market approach and scenario analysis                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 79,055 76,046              
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 | $ / shares     31     31      
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 | $ / shares     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 | $ / shares     83     84      
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     0.19    
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     1    
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       0.41     0.52    
Level 3 | Equity options | Volatility benchmarking | Volatility                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Derivative asset, measurement input             0.47    
Level 3 | Equity options | Volatility benchmarking | Volatility | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Derivative asset, measurement input | $ / shares     0.41            
Derivative liability, measurement input       0.29     0.33    
Level 3 | Equity options | Volatility benchmarking | Volatility | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Derivative asset, measurement input       0.57          
Derivative liability, measurement input       0.62     0.50    
Level 3 | Equity options | Volatility benchmarking | Volatility | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Derivative asset, measurement input       0.54          
Derivative liability, measurement input       0.46     0.42    
Level 3 | Interest rate swaps | Market approach | Basis points upfront | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Derivative asset, measurement input       0.7     1.2    
Derivative liability, measurement input       0.7     1.2    
Level 3 | Interest rate swaps | Market approach | Basis points upfront | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Derivative asset, measurement input       6.4     8.0    
Derivative liability, measurement input       6.4     8.0    
Level 3 | Interest rate swaps | Market approach | Basis points upfront | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Derivative asset, measurement input       3.3     4.8    
Derivative liability, measurement input       3.5     5.4    
Level 3 | Private equity securities                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned   67,108              
Level 3 | Private equity securities | Market approach and scenario analysis                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 45,472                
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 | $ / shares     6     1      
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 | $ / shares     169     169      
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 | $ / shares     53     34      
Level 3 | Private equity securities | Scenario analysis | Estimated recovery percentage                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned, measurement input       0.17     0.17    
Level 3 | Corporate equity securities                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments owned 83,278 75,797              
Financial instruments sold, not yet purchased 4,443 4,434              
Level 3 | Corporate equity securities | Market approach | Price                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments sold, not yet purchased, measurement input | $ / shares     1     1      
Level 3 | Loans                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Financial instruments sold, not yet purchased 14,916 16,635              
Debt instrument 14,916 16,635              
Level 3 | Loans | Market approach | Price | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Debt instrument, measurement input | $ / shares     31     31      
Level 3 | Loans | Market approach | Price | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Debt instrument, measurement input | $ / shares     50     99      
Level 3 | Loans | Market approach | Price | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Debt instrument, measurement input | $ / shares     35     55      
Level 3 | Loans | Scenario analysis | Estimated recovery percentage                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Debt instrument, measurement input       0.05          
Level 3 | Other secured financings | Scenario analysis | Estimated recovery percentage | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Other secured financings, measurement input       0.19     0.19    
Level 3 | Other secured financings | Scenario analysis | Estimated recovery percentage | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Other secured financings, measurement input       1     0.55    
Level 3 | Other secured financings | Scenario analysis | Estimated recovery percentage | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Other secured financings, measurement input       0.61     0.45    
Level 3 | Long-term debt                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Long-term debt $ 723,115 $ 676,028              
Level 3 | Long-term debt | Market approach | Price                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Long-term debt, measurement input | $ / shares           100      
Level 3 | Long-term debt | Market approach | Price | Minimum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Long-term debt, measurement input     104   82     76  
Level 3 | Long-term debt | Market approach | Price | Maximum                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Long-term debt, measurement input | € / shares         112     113  
Level 3 | Long-term debt | Market approach | Price | Weighted Average                  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                  
Long-term debt, measurement input     0   102 0   99