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Significant Accounting Judgments, Estimates and Assumptions - Additional Information (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
CNY (¥)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2020
USD ($)
Disclosure of changes in accounting estimates [line items]        
Carrying amounts of deferred tax assets ¥ 400,198   ¥ 422,960 $ 61,842
Increase in profit if all unrecognized deferred tax asset were recognized ¥ 157,600 $ 24,300 ¥ 162,000  
Bottom of range [member]        
Disclosure of changes in accounting estimates [line items]        
Cash flows derived from forecasts period eight years eight years    
Top of range [member]        
Disclosure of changes in accounting estimates [line items]        
Cash flows derived from forecasts period ten years ten years