v3.26.3
Investments - Summary of Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Net Investment Income [Line Items]    
Investment at fair value, cost $ 1,097,376 $ 1,010,488
Cumulative unrealized gains on investments 322,427 184,434
Cumulative unrealized losses on investments (78,523) (51,056)
Investments accounted for under the equity method 394,393 357,383
Total investments held at adjusted carrying value or fair value 1,735,673 1,501,249
Investments in publicly traded companies    
Net Investment Income [Line Items]    
Investment at fair value, cost 105,921 54,752
Cumulative unrealized gains on investments 56,294 44,319
Cumulative unrealized losses on investments (24,638) (4,143)
Investments at fair value 137,577 94,928
Investments in privately held entities that report NAV    
Net Investment Income [Line Items]    
Investment at fair value, cost 507,978 460,160
Cumulative unrealized gains on investments 215,565 89,514
Cumulative unrealized losses on investments (43,100) (37,298)
Investments at fair value 680,443 512,376
Investments in privately held entities that do not report NAV | Entities with observable price change    
Net Investment Income [Line Items]    
Investment at fair value, cost 77,062 82,252
Cumulative unrealized gains on investments 50,568 50,601
Cumulative unrealized losses on investments (10,785) (9,615)
Investments in privately held entities that do not report fair value, book value 116,845 123,238
Investments in privately held entities that do not report NAV | Entities without observable price changes    
Net Investment Income [Line Items]    
Investment at fair value, cost 406,415 413,324
Cumulative unrealized gains on investments 0 0
Cumulative unrealized losses on investments 0 0
Investments in privately held entities that do not report fair value, book value $ 406,415 $ 413,324