Intangible Assets, Net - Schedule of Intangible Assets with Definite Lives (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2017
CNY (¥)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
CNY (¥)
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Value ¥ 136,972   ¥ 108,967
Accumulated Amortization (86,049)   (79,300)
Net Carrying Value 50,923 $ 7,827 29,667
Trademarks [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Value 68,380   68,380
Accumulated Amortization (43,292)   (38,713)
Net Carrying Value 25,088 3,856 29,667
Customer Relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Value 9,050   9,050
Accumulated Amortization (9,050)   (9,050)
Net Carrying Value 0 0 0
Websites [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Value 27,000   27,000
Accumulated Amortization (27,000)   (27,000)
Net Carrying Value 0 0 0
Domain Names [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Value 1,917   1,870
Accumulated Amortization (1,870)   (1,870)
Net Carrying Value 47 7 0
Licensing Agreements [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Value 2,492   2,667
Accumulated Amortization (2,492)   (2,667)
Net Carrying Value 0 0 ¥ 0
Insurance Brokerage License [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross Carrying Value 28,133    
Accumulated Amortization (2,345)    
Net Carrying Value ¥ 25,788 $ 3,964