Long-Term Investments - Additional Information (Detail)
$ in Thousands |
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1 Months Ended |
12 Months Ended |
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May 31, 2015
CNY (¥)
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Jul. 31, 2017
CNY (¥)
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Dec. 31, 2017
CNY (¥)
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Dec. 31, 2017
USD ($)
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Dec. 31, 2016
CNY (¥)
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Dec. 31, 2015 |
Sep. 30, 2015
CNY (¥)
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| Visionstar Information Technology (Shanghai) Co., Ltd. [Member] |
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| Schedule of Equity Method Investments [Line Items] |
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| Business acquisition percentage of interests acquired |
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10.00%
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| Business acquisition cash consideration |
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¥ 30,000,000
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| Hunan Mango Autohome Automobile Sales Co Ltd [Member] |
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| Schedule of Equity Method Investments [Line Items] |
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| Total capital contribution |
¥ 100,000,000
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| Cash consideration paid to joint venture |
¥ 49,000,000
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| Ownership percentage |
49.00%
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| Impairment charges |
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¥ 0
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| Shanghai You Che You Jia Financing Co., Ltd |
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| Schedule of Equity Method Investments [Line Items] |
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| Cash consideration paid to joint venture |
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¥ 75,000,000
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| Ownership percentage |
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25.00%
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| Impairment charges |
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0
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| Other investments [Member] |
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| Schedule of Equity Method Investments [Line Items] |
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| Carrying amount of equity method investments |
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¥ 147,929,000
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$ 22,736
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¥ 134,466,000
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