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Financial Instruments - Disclosure of significant unobservable inputs - investments at fair value, assets (Details)
$ in Thousands
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Financial assets, at fair value $ 575,738 $ 944,832
Level 3 of fair value hierarchy    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Financial assets, at fair value 29,094 $ 254,653
Investments held at fair value | Level 3 of fair value hierarchy | Market Backsolve & OPM    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Financial assets, at fair value $ 11,403  
Investments held at fair value | Level 3 of fair value hierarchy | Weighted Average | Estimated Time to Exit | Market Backsolve & OPM    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Weighted Average 2.00  
Investments held at fair value | Level 3 of fair value hierarchy | Weighted Average | Volatility | Market Backsolve & OPM    
Disclosure of significant unobservable inputs used in fair value measurement of assets [line items]    
Weighted Average 0.55