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EARNINGS PER SHARE (Details) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 USD ($) | Dec. 31, 2014 CNY | Dec. 31, 2013 CNY | Dec. 31, 2012 CNY | Dec. 31, 2014 Class B Ordinary shares [Member] USD ($) | Dec. 31, 2014 Class B Ordinary shares [Member] CNY | Dec. 31, 2013 Class B Ordinary shares [Member] CNY | Dec. 31, 2012 Class B Ordinary shares [Member] CNY | Dec. 31, 2014 Class A Ordinary shares [Member] USD ($) | Dec. 31, 2014 Class A Ordinary shares [Member] CNY | Dec. 31, 2013 Class A Ordinary shares [Member] CNY
Basic Numerator: |  |  |  |  |  |  |  |  |  |  |
Allocation of net income attributable to ordinary shareholders used in calculating income per ordinary share-basic |  |  |  |  | $ 13,309 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 82,571 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 103,296 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 4,243 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 12,004 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 74,478 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 2,758 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Basic Denominator: |  |  |  |  |  |  |  |  |  |  |
Denominator used for earnings per share | 339,782,819 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 339,782,819 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 238,342,685 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 229,374,777 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 178,645,232 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 178,645,232 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 232,144,532 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 229,374,777 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 161,137,587 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 161,137,587 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 6,198,153 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Earnings per share-basic | $ 0.07 us-gaap_EarningsPerShareBasic | 0.46 us-gaap_EarningsPerShareBasic | 0.45 us-gaap_EarningsPerShareBasic | 0.02 us-gaap_EarningsPerShareBasic | $ 0.07 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 0.46 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 0.45 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 0.02 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.07 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 0.46 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 0.45 us-gaap_EarningsPerShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Diluted Numerator: |  |  |  |  |  |  |  |  |  |  |
Allocation of net income attributable to ordinary shareholders used in calculating income per ordinary share- diluted |  |  |  |  | 12,670 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 78,604 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 95,179 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 4,243 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 12,643 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 78,445 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 10,875 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Reallocation of net income attributable to ordinary shareholders as a result of conversion of Class B to Class A shares |  |  |  |  |  |  |  |  | 12,670 us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 78,604 us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 95,179 us-gaap_DilutiveSecuritiesEffectOnBasicEarningsPerShareOther / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Net income | $ 25,313 us-gaap_NetIncomeLoss | 157,049 us-gaap_NetIncomeLoss | 106,054 us-gaap_NetIncomeLoss | 4,243 us-gaap_NetIncomeLoss | $ 12,670 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 78,604 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 95,179 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 4,243 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 25,313 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 157,049 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 106,054 us-gaap_NetIncomeLoss / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Diluted Denominator: |  |  |  |  |  |  |  |  |  |  |
Weighted average number of ordinary shares outstanding used in calculating basic earnings per share | 339,782,819 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 339,782,819 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 238,342,685 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 229,374,777 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 178,645,232 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 178,645,232 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 232,144,532 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 229,374,777 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 161,137,587 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 161,137,587 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 6,198,153 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Conversion of Class B to Class A ordinary shares |  |  |  |  |  |  |  |  | 178,645,232 wbai_IncrementalCommonSharesAttributableToConversionOfCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 178,645,232 wbai_IncrementalCommonSharesAttributableToConversionOfCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 232,144,532 wbai_IncrementalCommonSharesAttributableToConversionOfCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Share options |  |  |  |  |  |  |  | 4,303,704 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 18,065,885 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 18,065,885 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 21,386,682 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Denominator used for earnings per share | 357,848,704 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 357,848,704 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 259,729,367 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 233,678,481 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 178,645,232 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 178,645,232 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 232,144,532 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 233,678,481 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 357,848,704 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 357,848,704 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 259,729,367 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Earnings per share-diluted | $ 0.07 us-gaap_EarningsPerShareDiluted | 0.44 us-gaap_EarningsPerShareDiluted | 0.41 us-gaap_EarningsPerShareDiluted | 0.02 us-gaap_EarningsPerShareDiluted | $ 0.07 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 0.44 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 0.41 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 0.02 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 0.07 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 0.44 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 0.41 us-gaap_EarningsPerShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Earnings per ADS: |  |  |  |  |  |  |  |  |  |  |
Denominator used for earnings per ADS - basic |  |  |  |  |  |  |  |  | 16,113,759 wbai_WeightedAverageNumberOfAmericanDepositarySharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 16,113,759 wbai_WeightedAverageNumberOfAmericanDepositarySharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 619,815 wbai_WeightedAverageNumberOfAmericanDepositarySharesOutstandingBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Denominator used for earnings per ADS - diluted |  |  |  |  |  |  |  |  | 35,784,870 wbai_WeightedAverageNumberOfDilutedAmericanDepositarySharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 35,784,870 wbai_WeightedAverageNumberOfDilutedAmericanDepositarySharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 25,972,937 wbai_WeightedAverageNumberOfDilutedAmericanDepositarySharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Earnings per ADS - basic | $ 0.74 wbai_EarningsPerAmericanDepositaryShareBasic | 4.62 wbai_EarningsPerAmericanDepositaryShareBasic | 4.45 wbai_EarningsPerAmericanDepositaryShareBasic |  |  |  |  |  | $ 0.74 wbai_EarningsPerAmericanDepositaryShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 4.62 wbai_EarningsPerAmericanDepositaryShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 4.45 wbai_EarningsPerAmericanDepositaryShareBasic / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
Earnings per ADS - diluted | $ 0.71 wbai_EarningsPerAmericanDepositaryShareDiluted | 4.39 wbai_EarningsPerAmericanDepositaryShareDiluted | 4.08 wbai_EarningsPerAmericanDepositaryShareDiluted |  |  |  |  |  | $ 0.71 wbai_EarningsPerAmericanDepositaryShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 4.39 wbai_EarningsPerAmericanDepositaryShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember | 4.08 wbai_EarningsPerAmericanDepositaryShareDiluted / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember

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- Definition Earnings Per American Depositary Share Diluted + References No definition available. + Details
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- Definition Incremental Common Shares Attributable To Conversion Of Common Stock + References No definition available. + Details
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Namespace Prefix: | wbai_
Data Type: | xbrli:sharesItemType
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- Definition Weighted Average Number Of American Depositary Shares Outstanding Basic + References No definition available. + Details
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Namespace Prefix: | wbai_
Data Type: | xbrli:sharesItemType
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- Definition Weighted Average Number Of Diluted American Depositary Shares Outstanding + References No definition available. + Details
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Namespace Prefix: | wbai_
Data Type: | xbrli:sharesItemType
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