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INCOME TAXES (Narrative Summary of Tax Rates) (Details) In Thousands, unless otherwise specified	12 Months Ended																				1 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY	Dec. 31, 2013 CNY	Dec. 31, 2012 CNY	Dec. 31, 2014 Hong Kong [Member]	Dec. 31, 2014 PRC [Member]	Dec. 31, 2014 PRC [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2014 PRC [Member] Youlanguang Technology [Member]	Dec. 31, 2014 PRC [Member] E-Sun Network [Member]	Dec. 31, 2014 PRC [Member] E-Sun Sky Computer [Member]	Dec. 31, 2013 PRC [Member] E-Sun Sky Computer [Member]	Dec. 31, 2012 PRC [Member] E-Sun Sky Computer [Member]	Dec. 31, 2014 PRC [Member] Guangtiandi Technology [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2013 PRC [Member] Guangtiandi Technology [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2012 PRC [Member] Guangtiandi Technology [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2014 PRC [Member] 500Fu [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2014 PRC [Member] Baifengrun Technology [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2014 PRC [Member] Lhasa Yicai [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2014 PRC [Member] Key Software Enterprise [Member] E-Sun Sky Network [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2013 PRC [Member] Key Software Enterprise [Member] E-Sun Sky Network [Member] Variable Interest Entity, Primary Beneficiary [Member]	Oct. 31, 2011 PRC [Member] High-tech Enterprise [Member] E-Sun Sky Network [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2014 PRC [Member] High-tech Enterprise [Member] E-Sun Sky Network [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2013 PRC [Member] High-tech Enterprise [Member] E-Sun Sky Network [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2012 PRC [Member] High-tech Enterprise [Member] E-Sun Sky Network [Member] Variable Interest Entity, Primary Beneficiary [Member]	Dec. 31, 2016 PRC [Member] High-tech Enterprise [Member] E-Sun Sky Network [Member] Variable Interest Entity, Primary Beneficiary [Member] Forecast [Member]	Dec. 31, 2015 PRC [Member] High-tech Enterprise [Member] E-Sun Sky Network [Member] Variable Interest Entity, Primary Beneficiary [Member] Forecast [Member]	Dec. 31, 2014 United States of America [Member] 500.com USA [Member] Variable Interest Entity, Primary Beneficiary [Member] USD ($)
Income Tax Contingency [Line Items]
Statutory EIT rate on taxable income					16.50%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_HK	25.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN	15.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	25.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenYoulanguangScienceAndTechnologyCoLtdMember	25.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenEsunNetworkCoLtdMember	12.50%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_EsunSkyComputerShenzhenCoLtdMember	12.50%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_EsunSkyComputerShenzhenCoLtdMember	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_EsunSkyComputerShenzhenCoLtdMember	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenGuangtiandiScienceAndTechnologyCoLtdMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	0.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenGuangtiandiScienceAndTechnologyCoLtdMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	25.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenGuangtiandiScienceAndTechnologyCoLtdMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	25.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenWubaiZhifuCoLtdMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	25.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_BeijingBaifengrunScienceAndTechnologyCoLtdMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	15.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_LhasaYicaiNetworkTechnologyCoLtdMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	10.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenEsunSkyNetworkTechnologyCoLtdMember / us-gaap_TaxCreditCarryforwardAxis = wbai_KeySoftwareEnterpriseMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	10.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenEsunSkyNetworkTechnologyCoLtdMember / us-gaap_TaxCreditCarryforwardAxis = wbai_KeySoftwareEnterpriseMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	15.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenEsunSkyNetworkTechnologyCoLtdMember / us-gaap_TaxCreditCarryforwardAxis = wbai_HighTechEnterpriseMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	15.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenEsunSkyNetworkTechnologyCoLtdMember / us-gaap_TaxCreditCarryforwardAxis = wbai_HighTechEnterpriseMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	15.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenEsunSkyNetworkTechnologyCoLtdMember / us-gaap_TaxCreditCarryforwardAxis = wbai_HighTechEnterpriseMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	15.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenEsunSkyNetworkTechnologyCoLtdMember / us-gaap_TaxCreditCarryforwardAxis = wbai_HighTechEnterpriseMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	15.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenEsunSkyNetworkTechnologyCoLtdMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember / us-gaap_TaxCreditCarryforwardAxis = wbai_HighTechEnterpriseMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember	15.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_CN / dei_LegalEntityAxis = wbai_ShenzhenEsunSkyNetworkTechnologyCoLtdMember / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember / us-gaap_TaxCreditCarryforwardAxis = wbai_HighTechEnterpriseMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Provision for income tax	$ 1,287us-gaap_IncomeTaxExpenseBenefit	7,987us-gaap_IncomeTaxExpenseBenefit	(76,294)us-gaap_IncomeTaxExpenseBenefit	18,001us-gaap_IncomeTaxExpenseBenefit
Assessable income

X

- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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.(h))

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Article 4



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Income Tax Expense (or Benefit)

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