Name:	ryb_AppropriationOfAfterTaxIncomeToDevelopmentFund
Namespace Prefix:	ryb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents appropriations to certain non-distributable general reserve in accordance with laws applicable to the reporting entity. The reserves can only be used for specific purposes and are not transferrable to the entity in the form of loans, advances or cash dividends. The reporting entity and its subsidiaries have to make appropriations from its after-tax profit.

No definition available.

Name:	ryb_GeneralReserve
Namespace Prefix:	ryb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the maximum threshold, expressed as a percentage of an entity's general reserve fund to its registered capital, for which allocations of after-tax profits to the general reserve fund are required.

No definition available.

Name:	ryb_GeneralReserveFundAsPercentageOfRegisteredCapitalThresholdForRequiredAllocationsOfAfterTaxProfitsToFundMaximum
Namespace Prefix:	ryb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the minimum percentage of annual increase in net assets required to be appropriated to the development fund under PRC GAAP for VIE's that do not require reasonable returns.

No definition available.

Name:	ryb_MinimumPercentageOfAnnualIncreaseOfNetAssetsToBeAllocatedToDevelopmentFund
Namespace Prefix:	ryb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the percentage of after tax profit required to be appropriated to the development fund under PRC GAAP for VIE's that require reasonable returns.

No definition available.

Name:	ryb_PercentageOfAfterTaxProfitToBeAllocatedToDevelopmentFund
Namespace Prefix:	ryb_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the percentage of after tax profit required to be appropriated to the general reserve under PRC GAAP.

No definition available.

Name:	ryb_PercentageOfAfterTaxProfitToBeAllocatedToGeneralReserveFund
Namespace Prefix:	ryb_
Data Type:	num:percentItemType
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://www.xbrl.org/2003/role/presentationRef
-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

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.