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Investments in Equity Method Investees (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Mar. 31, 2020
Schedule of Equity Method Investments [Line Items]        
Gain (loss) from equity method investees $ 13,179 $ 10,039 $ (9,465)  
Impairment of equity method investments 0 47,133 0  
Variable Interest Entity, Not Primary Beneficiary | Global Health        
Schedule of Equity Method Investments [Line Items]        
Statutory capital reserves, liquidity guaranteed by investors       300.00%
Equity interest to be transferred       100.00%
Impairment of equity method investments   47,100    
Equity Method Investee | Services Agreements        
Schedule of Equity Method Investments [Line Items]        
Income from long-term services agreement $ 15,900 $ 192,800 $ 41,500  
Minimum        
Schedule of Equity Method Investments [Line Items]        
Economic interest percentage 4.00% 4.00%    
Voting interest percentage 25.00% 25.00%    
Maximum        
Schedule of Equity Method Investments [Line Items]        
Economic interest percentage 39.00% 38.00%    
Voting interest percentage 40.00% 40.00%