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Investments and Fair Value Measurements - Investment Category and Length (Details)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2022
USD ($)
company
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
company
Summary of fair value and gross unrealized losses related to available-for-sale securities [Abstract]      
Fair value, in loss position less than twelve months $ 6,061   $ 12,151
Gross unrealized (loss), in loss position less than twelve months (189)   (61)
Fair value, in loss position greater than twelve months 4,991   2,013
Gross unrealized (loss), in loss position greater than twelve months (177)   (4)
Fair value, total in loss position 11,052   14,164
Gross unrealized (loss), total in loss position (366)   (65)
Restricted Cash      
Restricted cash 3,900    
Minority Investments      
Investments, equity method $ 13,727   $ 10,166
Number of equity method investments | company 6   5
Impairment charge $ 0 $ 0  
Bank Of Beijing      
Restricted Cash      
Maximum borrowing capacity 3,400    
Bank Of Beijing | Secured debt      
Restricted Cash      
Time deposit 3,900    
Certificates of deposit.      
Summary of fair value and gross unrealized losses related to available-for-sale securities [Abstract]      
Fair value, in loss position less than twelve months 5,317   $ 6,181
Gross unrealized (loss), in loss position less than twelve months (163)   (19)
Fair value, in loss position greater than twelve months 928    
Gross unrealized (loss), in loss position greater than twelve months (32)    
Fair value, total in loss position 6,245   6,181
Gross unrealized (loss), total in loss position (195)   (19)
Corporate bonds      
Summary of fair value and gross unrealized losses related to available-for-sale securities [Abstract]      
Fair value, in loss position less than twelve months 744   5,970
Gross unrealized (loss), in loss position less than twelve months (26)   (42)
Fair value, in loss position greater than twelve months 4,063   2,013
Gross unrealized (loss), in loss position greater than twelve months (145)   (4)
Fair value, total in loss position 4,807   7,983
Gross unrealized (loss), total in loss position (171)   (46)
Other assets      
Minority Investments      
Investments, equity method $ 13,700   $ 10,200