v3.26.1
Fair Value - Fair Value Measurements, Recurring and Nonrecurring (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value $ 329,580 $ 271,034
Trading 223,455 165,443
Equity method investments 9 8
Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 30,224 105,706
Equity investments at fair value   271,034
Fair value 553,044 436,485
Derivatives - assets: 2,148 786
Derivatives - liabilities: 948 2,019
Fair Value, Measurements, Recurring | Forward contracts - foreign exchange    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives - assets: 224 433
Derivatives - liabilities: 3 55
Fair Value, Measurements, Recurring | Total Return Swap    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives - assets: 1,924 353
Derivatives - liabilities: 945 1,964
Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 30,224 105,706
Equity investments at fair value 122,228 118,553
Fair value 122,228 118,553
Derivatives - assets: 0 0
Derivatives - liabilities: 0 0
Fair Value, Measurements, Recurring | Level 1 | Forward contracts - foreign exchange    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives - liabilities: 0  
Fair Value, Measurements, Recurring | Level 1 | Total Return Swap    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives - assets: 0  
Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 119,034 80,868
Fair value 342,489 246,311
Derivatives - assets: 2,148 786
Derivatives - liabilities: 948 2,019
Fair Value, Measurements, Recurring | Level 2 | Forward contracts - foreign exchange    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives - assets: 224 433
Derivatives - liabilities: 3 55
Fair Value, Measurements, Recurring | Level 2 | Total Return Swap    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivatives - assets: 1,924 353
Derivatives - liabilities: 945 1,964
Fair Value, Measurements, Recurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 84,682 65,335
Fair value 84,682 65,335
Fair Value, Measurements, Recurring | Investments Measured at NAV    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 3,636 6,278
Fair value 3,645 6,286
Equity securities | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 241,406 199,559
Equity securities | Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 122,228 118,553
Equity securities | Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 119,034 80,868
Equity securities | Fair Value, Measurements, Recurring | Investments Measured at NAV    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 144 138
Limited partnership interests | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 88,174 71,475
Limited partnership interests | Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 0 0
Limited partnership interests | Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 0  
Limited partnership interests | Fair Value, Measurements, Recurring | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 84,682  
Limited partnership interests | Fair Value, Measurements, Recurring | Investments Measured at NAV    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments at fair value 3,492 6,140
Fixed income | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading   165,443
Fixed income | Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading 0  
Fixed income | Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading 223,455 165,443
Fixed income | Fair Value, Measurements, Recurring | Investments Measured at NAV    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading 0 0
Equity method investments | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity method investments   8
Equity method investments | Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity method investments 0 0
Equity method investments | Fair Value, Measurements, Recurring | Investments Measured at NAV    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity method investments $ 9 $ 8