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Leases - Summary of detailed Information About Carrying Amounts of Right-of-use Assets Recognized and Movements During Year (Detail)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2020
USD ($)
Disclosure of quantitative information about right-of-use assets [line items]        
Beginning balance ¥ 384,001 $ 60,739 ¥ 415,384 $ 65,702
Addition 23,971 3,792 15,256 2,413
Depreciation expenses (41,458) (6,558) (43,298) (6,848)
Disposal (21,620) (3,420) (3,198) (506)
Translation difference (80) (13) (143) (22)
Ending balance 344,814 $ 54,540 384,001 $ 60,739
Leasehold land [member]        
Disclosure of quantitative information about right-of-use assets [line items]        
Beginning balance 338,565   353,807  
Addition 1,355   2,058  
Depreciation expenses (13,655)   (14,102)  
Disposal (21,620)   (3,198)  
Translation difference 0   0  
Ending balance 304,645   338,565  
Building and office space [member]        
Disclosure of quantitative information about right-of-use assets [line items]        
Beginning balance 45,430   61,556  
Addition 22,558   13,198  
Depreciation expenses (27,790)   (29,182)  
Disposal 0   0  
Translation difference (80)   (142)  
Ending balance 40,118   45,430  
Office Furniture, Fittings and Equipment [member]        
Disclosure of quantitative information about right-of-use assets [line items]        
Beginning balance 6   21  
Addition 58   0  
Depreciation expenses (13)   (14)  
Disposal 0   0  
Translation difference 0   (1)  
Ending balance ¥ 51   ¥ 6