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Investments - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Schedule of Investments [Line Items]          
Allowance for credit losses on available-for-sale investments $ 0   $ 0   $ 0
Impairment loss on investments 0 $ 0 0 $ 0  
Investments (915,726,000)   (915,726,000)   (1,078,257,000)
Long-term Investments          
Schedule of Investments [Line Items]          
Investments $ (2,635,000)   $ (2,635,000)   $ (8,218,000)
ORIC          
Schedule of Investments [Line Items]          
Stock held in investment (shares) 588,235   588,235   588,235