Name:	jobs_AppropriationToStatutoryCommonReserveFund
Namespace Prefix:	jobs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the amount of retained earnings appropriated to the statutory common welfare fund during the reporting period.

No definition available.

Name:	jobs_AppropriationToStatutoryCommonWelfareFund
Namespace Prefix:	jobs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the amount of retained earnings appropriated to the statutory reserve fund by the Group's subsidiaries and VIEs during the reporting period.

No definition available.

Name:	jobs_AppropriationsMadeBySubsidiariesAndVieToStatutoryReserveFunds
Namespace Prefix:	jobs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Revenue earned during the period from non-repayable sum of money awarded to an entity by local government and are recognized as other income when received and when all conditions for their receipt have been satisfied.

No definition available.

Name:	jobs_GovernmentSubsidies
Namespace Prefix:	jobs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the minimum percentage of the statutory common reserve to registered capital, exceeding which further appropriations to the reserve are discretionary for entities incorporated in the PRC as per the PRC laws and regulations applicable to the entity and its subsidiaries.

No definition available.

Name:	jobs_PercentageOfRegisteredCapitalReached
Namespace Prefix:	jobs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the minimum percentage of after tax profit required to be appropriated to the statutory common reserve as per the PRC laws and regulations applicable to the entity and its subsidiaries.

No definition available.

Name:	jobs_RequiredPercentageAllocationToStatutoryCommonReserve
Namespace Prefix:	jobs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the percentage as restricted net assets of subsidiaries not distributable in the form of dividends to the parent to the total consolidated net assets.

No definition available.

Name:	jobs_RestrictedNetAssetsPercentageOfConsolidatedNetAssets
Namespace Prefix:	jobs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	jobs_SummaryOfPrincipalAccountingPoliciesLineItems
Namespace Prefix:	jobs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Name:	us-gaap_AmountOfRestrictedNetAssetsForConsolidatedAndUnconsolidatedSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of excise and sales taxes included in sales and revenues, which are then deducted as a cost of sales. Includes excise taxes, which are applied to specific types of transactions or items (such as gasoline or alcohol); and sales, use and value added taxes, which are applied to a broad class of revenue-producing transactions involving a wide range of goods and services.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Name:	us-gaap_ExciseAndSalesTaxes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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.

No definition available.

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Amount of unrecognized tax benefits.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
-URI http://asc.fasb.org/extlink&oid=116821951&loc=SL37586934-109318

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319