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Financial Assets and Liabilities - Level 3 Financial Instruments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair value, asset, recurring basis, unobservable input reconciliation, gain (loss), statement of income or comprehensive income [Extensible Enumeration] Other, net  
Fair value, asset, recurring basis, still held, unrealized gain (loss), statement of income or comprehensive income [Extensible Enumeration] Other, net  
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 75,843 $ 81,805
Purchases 0 0
Total realized and unrealized gains / (losses) 10,648 (5,962)
Net Transfers into (out of) Level 3 0 0
Settlement 0 0
Ending balance 86,491 75,843
Change in net unrealized gains / (losses) on investments still held at end of period 10,648 (5,962)
Equity investment    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 75,843 81,805
Purchases 0 0
Total realized and unrealized gains / (losses) 10,648 (5,962)
Net Transfers into (out of) Level 3 0 0
Settlement 0 0
Ending balance 86,491 75,843
Change in net unrealized gains / (losses) on investments still held at end of period $ 10,648 $ (5,962)