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INVESTMENTS (Schedule of Derivative Instruments at Fair Value) (Details) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY	Dec. 31, 2013 CNY	Dec. 31, 2012 CNY	Dec. 31, 2014 Structured Deposit [Member] CNY	Dec. 31, 2014 Structured Deposit [Member] USD ($)
Investment Holdings [Line Items]
Original costs	$ 11,492us-gaap_PaymentsForProceedsFromShortTermInvestments	71,306us-gaap_PaymentsForProceedsFromShortTermInvestments		(4,000)us-gaap_PaymentsForProceedsFromShortTermInvestments	71,306us-gaap_PaymentsForProceedsFromShortTermInvestments / us-gaap_InvestmentTypeAxis = wbai_StructuredDepositMember
Gross unrealized gains
Gross unrealized losses					(1,124)wbai_UnrealizedLossOnShortTermInvestment / us-gaap_InvestmentTypeAxis = wbai_StructuredDepositMember
Provision for decline in value
Fair value of investments	11,311us-gaap_ShortTermInvestments	70,182us-gaap_ShortTermInvestments			70,182us-gaap_ShortTermInvestments / us-gaap_InvestmentTypeAxis = wbai_StructuredDepositMember	11,311us-gaap_ShortTermInvestments / us-gaap_InvestmentTypeAxis = wbai_StructuredDepositMember
Changes in fair value of the structured deposit	$ (181)wbai_UnrealizedGainLossOnChangeInFairValueOfShortTermInvestment	(1,124)wbai_UnrealizedGainLossOnChangeInFairValueOfShortTermInvestment

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- Definition

The net amount paid (received) by the reporting entity through acquisition or sale and maturities of short-term investments with an original maturity that is three months or less which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585

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- Definition

Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Subparagraph g

-Article 7

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The amount of provision created for decline in fair value of short term investments.

+ References

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Amount of gain (loss) from the increase (decrease) in fair value of short-term investment recognized in the income statement.

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No definition available.

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Amount of gains in fair value of short-term investment recognized in the income statement.

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Amount of loss in fair value of short-term investment recognized in the income statement.

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