v3.26.3
Fair Value Measurement - Realized and Unrealized Gains (Losses) on Financial Instruments, Net (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Sep. 30, 2023
Fair Value Measurement            
Realized and unrealized gains (losses), net $ 309,200 $ (175,735) $ (344,079) $ (481,559)    
Downward adjustments for equity securities without readily determinable fair value 1,465 0 1,518 6,943    
Cumulative downward adjustments for equity securities without readily determinable fair value 23,538   23,538      
Upward adjustments for equity securities without readily determinable fair value     2,074      
Cumulative upward adjustments for equity securities without readily determinable fair value 129,187   129,187      
Impairment of equity securities without readily determinable fair value 0 0 0 0    
Cumulative impairment for equity securities without readily determinable fair value $ 14,707   14,707      
2.375% Old Exchangeable Debentures due 2053            
Fair Value Measurement            
Gain (loss) on retirement of debentures     $ (10,404)      
Interest rate 2.375%   2.375%   2.375% 2.375%
Equity securities            
Fair Value Measurement            
Realized and unrealized gains (losses), net $ (1,465)   $ 556 (6,943)    
Financial instrument liabilities            
Fair Value Measurement            
Realized and unrealized gains (losses), net 146,333 (60,000) (47,318) (149,914)    
Debt            
Fair Value Measurement            
Realized and unrealized gains (losses), net 164,332 (115,735) (297,317) (324,702)    
Gain (loss) on changes in fair value 4,666 $ 11,834 (11,828) $ 8,234    
Cumulative gain on changes in fair value $ 715   $ 715