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Debt - Revolving Credit Facility Borrowings (Details)
$ in Thousands, ¥ in Millions
Sep. 30, 2021
USD ($)
Sep. 30, 2021
CNY (¥)
Dec. 31, 2020
USD ($)
Dec. 31, 2020
CNY (¥)
Bank indebtedness [Line Items]        
Unamortized debt issuance costs $ (1,488)   $ (1,967)  
Revolving Credit Facility Borrowings, net 9,486   305,676  
Credit Facility [Member]        
Bank indebtedness [Line Items]        
Borrowings     300,000  
Working Capital Facility [Member]        
Bank indebtedness [Line Items]        
Borrowings $ 10,974 ¥ 71.2 $ 7,600 ¥ 49.9