XML 125 R51.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 USD ($) Segment | Dec. 31, 2013 CNY | Dec. 31, 2012 CNY | Dec. 31, 2011 CNY | Sep. 30, 2014 | Dec. 31, 2013 China [Member] Autohome WFOE [Member] | Dec. 31, 2012 China [Member] Autohome WFOE [Member] | Dec. 31, 2013 China [Member] Autohome Shanghai Advertising Co., Ltd. [Member] | Dec. 31, 2013 China [Member] Beijing Autohome Software Co., Ltd. [Member] | Dec. 31, 2013 China [Member] Beijing Autohome Technologies Co., Ltd. [Member] | Dec. 31, 2013 China [Member] Beijing Autohome Advertising Co., Ltd. [Member] | Dec. 31, 2013 China [Member] Guangzhou Autohome Advertising Co., Ltd. [Member] | Dec. 31, 2013 China [Member] Beijing Autohome Information Technology Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2012 China [Member] Beijing Autohome Information Technology Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2013 China [Member] Beijing Shengtuo Autohome Advertising Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2012 China [Member] Beijing Shengtuo Autohome Advertising Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2013 China [Member] Beijing Shengtuo Hongyuan Information Technology Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2012 China [Member] Beijing Shengtuo Hongyuan Information Technology Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2013 China [Member] Beijing Shengtuo Chengshi Advertising Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2012 China [Member] Beijing Shengtuo Chengshi Advertising Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2013 China [Member] Shanghai Youche Youjia Advertising Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2012 China [Member] Shanghai Youche Youjia Advertising Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2013 China [Member] Guangzhou Youche Youjia Advertising Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2012 China [Member] Guangzhou Youche Youjia Advertising Co., Ltd. [Member] Consolidated VIEs [Member] | Dec. 31, 2013 Maximum [Member]
Schedule Of Organization And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exchange rate of one US$ to RMB | 6.0537 | 6.0537 |  |  | 6.1380 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Original maturity period, time deposits. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 months
Loan facility repayment date | Dec. 27, 2013 | Dec. 27, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restrictions removal date | Feb. 20, 2014 | Feb. 20, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, impairment loss | $ 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets, impairment charge | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recorded rebates to advertising agencies companies | 38,181,000 | 231,136,000 | 153,388,000 | 109,573,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value added tax rate |  |  |  |  |  | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% | 6.00% |
Advertising expenditures | 14,239,000 | 86,198,000 | 37,858,000 | 18,830,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Product development expenses capitalized | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum percentage of estimated remaining economic life, Capital lease classification requirement | 75.00% | 75.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum percentage of net present value of minimum lease payments over the fair value of leased property | 90.00% | 90.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operating segment | 1 | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total expenses for employee benefits | $ 3,867,000 | 23,410,000 | 13,666,000 | 9,717,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition Maturity period used to classify cash and cash equivalent and investments. + References No definition available. + Details
Name: | athm_MaturityOfTimeDepositInBank
Namespace Prefix: | athm_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum percentage of a lease's estimated remaining economic life required for determining for capital lease classification. + References No definition available. + Details
Name: | athm_MinimumPercentageOfEstimatedEconomicLifeOfLeasedProperty
Namespace Prefix: | athm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum Percentage Of Fair Value Of Leased Assets As Net Present Value To Be Classified Under Capital Lease + References No definition available. + Details
Name: | athm_MinimumPercentageOfFairValueOfLeasedAssetsAsNetPresentValueToBeClassifiedUnderCapitalLease
Namespace Prefix: | athm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Product Development Costs Capitalized + References No definition available. + Details
Name: | athm_ProductDevelopmentCostsCapitalized
Namespace Prefix: | athm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Restricted Cash, Restriction Removal Date + References No definition available. + Details
Name: | athm_RestrictedCashRestrictionRemovalDate
Namespace Prefix: | athm_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | athm_ScheduleOfOrganizationAndSummaryOfSignificantAccountingPoliciesLineItems
Namespace Prefix: | athm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Value Added Tax Rate + References No definition available. + Details
Name: | athm_ValueAddedTaxRate
Namespace Prefix: | athm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
Name: | us-gaap_AdvertisingExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521 + Details
Name: | us-gaap_ForeignCurrencyExchangeRateTranslation1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13854-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillImpairmentLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28367520&loc=d3e92212-112881 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Impairment -URI http://asc.fasb.org/extlink&oid=6515133 + Details
Name: | us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
Name: | us-gaap_NumberOfOperatingSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
Name: | us-gaap_PensionAndOtherPostretirementBenefitExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of reduction to gross sales revenue attributable to price protection agreements with customers or clients which limit the sales price of goods or services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 605 -Section 25 -Paragraph 36 -Subparagraph d -URI http://asc.fasb.org/extlink&oid=22169047&loc=d3e131949-111767 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 926 -SubTopic 605 -Section 25 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=7493515&loc=d3e57444-107978 + Details
Name: | us-gaap_SalesAllowancesPriceProtection
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration