v3.25.2
Investments - Summary of Investments (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
investment
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
investment
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Schedule of Investments          
Cost method investment ownership percentage 10.00%   10.00%    
Number of equity method investments | investment 10   10    
Fair Value, Investments, Privately Held Entities that Calculate NAV, Unfunded Commitments $ 351,000   $ 351,000    
Limited partnership maximum expiration terms     12 years    
Weighted-average remaining liquidation term (in years)     5 years 2 months 12 days    
Limited partnership liquidation, expected initial term (in years)     10 years    
Equity Securities, FV-NI, Realized Gain 30,500   $ 59,900    
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount 39,200   50,400    
Equity in (losses) earnings of unconsolidated real estate joint ventures (9,021) $ 130 (9,528) $ 285  
Summary of Investment [Abstract]          
Investment at fair value, cost 1,192,238   1,192,238   $ 1,207,146
Cumulative unrealized gains on investments 180,151   180,151   228,100
Cumulative unrealized losses on investments (172,468)   (172,468)   (144,489)
Investments accounted for under the equity method 276,775   276,775   186,228
Total investments held at adjusted carrying value or fair value 1,476,696   1,476,696   1,476,985
Investment Income, Net [Abstract]          
Realized (losses) gains (8,684) 20,578 9,469 34,704  
Unrealized losses (21,938) (64,238) (90,083) (35,080)  
Investment loss (30,622) $ (43,660) (80,614) (376)  
Equity Method Investments          
Schedule of Investments          
Equity in (losses) earnings of unconsolidated real estate joint ventures     (102)    
Investments in publicly traded companies          
Summary of Investment [Abstract]          
Investment at fair value, cost 183,859   183,859   188,653
Cumulative unrealized gains on investments 18,365   18,365   24,262
Cumulative unrealized losses on investments (120,299)   (120,299)   (107,248)
Investments at fair value, book value 81,925   $ 81,925   105,667
Investments in privately held entities that report NAV          
Schedule of Investments          
Weighted-average remaining liquidation term (in years)     8 years    
Summary of Investment [Abstract]          
Investment at fair value, cost 497,975   $ 497,975   518,074
Cumulative unrealized gains on investments 97,201   97,201   126,077
Cumulative unrealized losses on investments (43,013)   (43,013)   (34,285)
Investments at fair value, book value 552,163   552,163   609,866
Investments in privately held entities that do not report NAV | Entities with observable price change          
Schedule of Investments          
Investment in privately held entities that do not report NAV, cumulative price adjustments (123,300)   (123,300)    
Investments in privately held entities that do not report NAV, cumulative upward price adjustment 64,600   64,600    
Investments in privately held entities that do not report NAV, cumulative downward price adjustment (9,200)   (9,200)    
Investments in privately held entities that do not report NAV, cumulative impairment loss (178,700)   (178,700)    
Equity Securities without Readily Determinable Fair Value, Net Upward (Downward) Price Adjustment, Annual Amount     (57,600) (13,700)  
Investments in privately held entities that do not report NAV, annual upward price adjustment     8,800 15,700  
Investments in privately held entities that do not report NAV, annual downward price adjustment     66,400 29,400  
Summary of Investment [Abstract]          
Investment at fair value, cost 78,105   78,105   99,932
Cumulative unrealized gains on investments 64,585   64,585   77,761
Cumulative unrealized losses on investments (9,156)   (9,156)   (2,956)
Investments in privately held entities that do not report fair value, book value 133,534   133,534   174,737
Investments in privately held entities that do not report NAV | Entities without observable price changes          
Summary of Investment [Abstract]          
Investment at fair value, cost 432,299   432,299   400,487
Cumulative unrealized gains on investments 0   0   0
Cumulative unrealized losses on investments 0   0   0
Investments in privately held entities that do not report fair value, book value $ 432,299   432,299   $ 400,487
Total investments held          
Investment Income, Net [Abstract]          
Unrealized losses     $ (30,700) $ (1,800)