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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, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Disclosure of quantitative information about right-of-use assets [line items]        
Beginning balance ¥ 344,814 $ 49,600 ¥ 384,001 $ 55,237
Addition 49,735 7,154 23,971 3,448
Depreciation expenses (43,129) (6,204) (41,458) (5,964)
Disposal (3,256) (468) (21,620) (3,110)
Termination (6,187) (890)    
Translation difference 164 24 (80) (11)
Ending balance 342,141 $ 49,216 344,814 $ 49,600
Leasehold land [member]        
Disclosure of quantitative information about right-of-use assets [line items]        
Beginning balance 304,645   338,565  
Addition 0   1,355  
Depreciation expenses (12,324)   (13,655)  
Disposal (3,256)   (21,620)  
Termination 0      
Translation difference 0   0  
Ending balance 289,065   304,645  
Building and office space [member]        
Disclosure of quantitative information about right-of-use assets [line items]        
Beginning balance 40,118   45,430  
Addition 49,421   22,558  
Depreciation expenses (30,772)   (27,790)  
Disposal 0   0  
Termination (6,187)      
Translation difference 159   (80)  
Ending balance 52,739   40,118  
Office Furniture, Fittings and Equipment [member]        
Disclosure of quantitative information about right-of-use assets [line items]        
Beginning balance 51   6  
Addition 0   58  
Depreciation expenses (14)   (13)  
Disposal 0   0  
Termination 0      
Translation difference 5   0  
Ending balance 42   51  
Motor vehicles [member]        
Disclosure of quantitative information about right-of-use assets [line items]        
Beginning balance 0   0  
Addition 314   0  
Depreciation expenses (19)   0  
Disposal 0   0  
Termination 0      
Translation difference 0   0  
Ending balance ¥ 295   ¥ 0