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Property, Plant and Equipment - Additional Information (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2017
CNY (¥)
Dec. 31, 2016
CNY (¥)
[1]
Dec. 31, 2018
CNY (¥)
Disclosure of detailed information about property, plant and equipment [abstract]          
Impairment loss $ 4,510 ¥ 30,173,000 ¥ 20,845,000 [1] ¥ 3,297,000  
Property, plant and equipment piedged to secure bank facilities     82,700,000   ¥ 0
Carrying value of property, plant and equipment held under finance leases $ 100   100,000   ¥ 100,000
Additions of property, plant and equipment under finance leases   ¥ 0 ¥ 0    
[1] Restated