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INCOME TAXES (Summary of Aggregate Amount and per Share Effect of Tax Holidays) (Details) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY	Dec. 31, 2013 CNY	Dec. 31, 2012 CNY	Dec. 31, 2014 Basic [Member] USD ($)	Dec. 31, 2014 Basic [Member] CNY	Dec. 31, 2013 Basic [Member] CNY	Dec. 31, 2012 Basic [Member] CNY	Dec. 31, 2014 Diluted [Member] USD ($)	Dec. 31, 2014 Diluted [Member] CNY	Dec. 31, 2013 Diluted [Member] CNY	Dec. 31, 2012 Diluted [Member] CNY
Income Tax Holiday [Line Items]
The aggregate amount	$ 2,606us-gaap_IncomeTaxHolidayAggregateDollarAmount	16,170us-gaap_IncomeTaxHolidayAggregateDollarAmount	942us-gaap_IncomeTaxHolidayAggregateDollarAmount	8,449us-gaap_IncomeTaxHolidayAggregateDollarAmount
The aggregate effect on basic and diluted earnings per share for Class A and Class B ordinary shares outstanding					$ 0.01us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare / us-gaap_IncomeStatementLocationAxis = wbai_BasicMember	0.05us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare / us-gaap_IncomeStatementLocationAxis = wbai_BasicMember		0.04us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare / us-gaap_IncomeStatementLocationAxis = wbai_BasicMember	$ 0.01us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare / us-gaap_IncomeStatementLocationAxis = wbai_DilutedMember	0.05us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare / us-gaap_IncomeStatementLocationAxis = wbai_DilutedMember		0.04us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare / us-gaap_IncomeStatementLocationAxis = wbai_DilutedMember

X

- Definition

The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 11.C)

-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 11

-Section C

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Per share amount effect of the income tax benefit resulting from the income tax holidays granted by taxing jurisdictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 11.C)

-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 11

-Section C

+ Details

Name:	us-gaap_IncomeTaxHolidayIncomeTaxBenefitsPerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_IncomeTaxHolidayLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration