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SHARE OPTION AND RESTRICTED SHARE SCHEME - Additional Infomration (Detail)
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12 Months Ended | 12 Months Ended | 1 Months Ended | 1 Months Ended | 12 Months Ended | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2011
USD ($)
Year
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Dec. 31, 2011
CNY
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Dec. 31, 2010
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Dec. 31, 2011
Maximum
CNY
|
Dec. 31, 2009
Maximum
CNY
|
Dec. 31, 2011
Minimum
CNY
|
Dec. 31, 2009
Minimum
CNY
|
Dec. 31, 2011
Online Game Product Development Costs
USD ($)
|
Dec. 31, 2011
Online Game Product Development Costs
CNY
|
Dec. 31, 2010
Online Game Product Development Costs
CNY
|
Dec. 31, 2009
Online Game Product Development Costs
CNY
|
Dec. 31, 2011
Restricted Stock
USD ($)
|
Dec. 31, 2011
Restricted Stock
CNY
|
Sep. 30, 2006
Stock Incentive Plan 2006
|
May 15, 2007
Stock Incentive Plan 2006
Directors and Consultants
USD ($)
|
Mar. 19, 2007
Stock Incentive Plan 2006
Directors and Consultants
USD ($)
|
Sep. 17, 2010
Stock Incentive Plan 2007
CNY
Person
|
Oct. 17, 2007
Stock Incentive Plan 2007
USD ($)
|
Sep. 17, 2010
Stock Incentive Plan 2007
USD ($)
|
Sep. 17, 2010
Stock Incentive Plan 2007
Employees Vested
CNY
|
Oct. 12, 2007
Stock Incentive Plan 2007
Maximum
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Oct. 12, 2007
Stock Incentive Plan 2007
Minimum
|
Apr. 23, 2010
Stock Incentive Plan 2007
Restricted Stock
|
Oct. 31, 2011
Stock Incentive Plan 2007
Employee Directors, Plan
USD ($)
Person
|
Oct. 31, 2011
Stock Incentive Plan 2007
Employee Directors, Plan
CNY
|
Feb. 27, 2009
Non Performance Based Shares
USD ($)
|
Sep. 09, 2008
Non Performance Based Shares
Officers and Key Management Employees
USD ($)
|
Feb. 14, 2008
Non Performance Based Shares
Officers and Key Management Employees
USD ($)
|
Feb. 01, 2008
Non Performance Based Shares
Officers and Key Management Employees
USD ($)
|
Jan. 14, 2011
Non Performance Based Shares
Independent Directors Compensation Plan
USD ($)
|
Aug. 08, 2011
Accelerated Vesting of Stock Options
USD ($)
|
Aug. 08, 2011
Accelerated Vesting of Stock Options
CNY
|
Dec. 31, 2011
Employee Stock Option
USD ($)
|
Dec. 31, 2011
Employee Stock Option
CNY
|
Dec. 31, 2010
Employee Stock Option
CNY
|
Dec. 31, 2009
Employee Stock Option
CNY
|
Aug. 08, 2011
Employee Stock Option
USD ($)
|
Aug. 08, 2011
Employee Stock Option
CNY
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||||||||||||||||||||||||
| Authorized share option scheme | 16,000,000 | 23,700,000 | ||||||||||||||||||||||||||||||||||||
| Share options and SARs, Maximum term | 6 years | 10 years | ||||||||||||||||||||||||||||||||||||
| Awards vest period | 5 years | 5 years | 4 years | 5 years | 5 years | 5 years | 4 years | |||||||||||||||||||||||||||||||
| Share option annual vesting percentage | 20.00% | 20.00% | 20.00% | 25.00% | 20.00% | |||||||||||||||||||||||||||||||||
| Share option granted | 60,000 | 3,800,000 | 920,000 | 1,743,500 | 335,000 | 560,500 | 50,000 | 60,000 | 60,000 | |||||||||||||||||||||||||||||
| Exercise share based option fair value | $ 6.71 | $ 2.00 | $ 2.00 | $ 15.50 | $ 6.36 | $ 4.07 | $ 6.00 | $ 8.01 | $ 10.50 | $ 10.29 | $ 7.24 | |||||||||||||||||||||||||||
| Share option granted, Restricted shares | 797,000 | 14,000,000 | 14,000,000 | |||||||||||||||||||||||||||||||||||
| Restricted shares, vesting term | One fifth of the total restricted shares will become vested upon each annual anniversary of the grant date during the following five years. | One fifth of the total restricted shares will become vested upon each annual anniversary of the grant date during the following five years. | One fifth of the total restricted shares will become vested upon each annual anniversary of the grant date during the following five years. | |||||||||||||||||||||||||||||||||||
| Total Share options outstanding | 3,191,950 | 11,385,629 | 2,414,000 | |||||||||||||||||||||||||||||||||||
| Number of employees | 120 | 84 | 84 | |||||||||||||||||||||||||||||||||||
| Incremental compensation cost for the modification | 8,273,839 | 5,300,346 | $ 335,897 | 2,114,102 | ||||||||||||||||||||||||||||||||||
| Vesting share | 400,000 | 400,000 | ||||||||||||||||||||||||||||||||||||
| Compensation expenses | 1,589,000 | 10,000,000 | 1,112,000 | 7,000,000 | ||||||||||||||||||||||||||||||||||
| Share based compensation exercise price range lower range limit | $ 6.00 | |||||||||||||||||||||||||||||||||||||
| Share based compensation exercise price range upper range limit | $ 7.24 | |||||||||||||||||||||||||||||||||||||
| Number of shares from stock incentive plan ,modified | 1,098,600 | 1,098,600 | ||||||||||||||||||||||||||||||||||||
| Incremental compensation cost allocated to share based compensation | 230,248 | 1,449,156 | ||||||||||||||||||||||||||||||||||||
| Intrinsic value of options exercised | 44,197,000 | 278,174,000 | 33,700,000 | 53,100,000 | ||||||||||||||||||||||||||||||||||
| Weighted average estimated fair value of options granted | 19.85 | 22.37 | 15.75 | 17.35 | $ 2.93 | 18.45 | 20.32 | |||||||||||||||||||||||||||||||
| Total fair value of options vested | 5,905,122 | 37,166,249 | 29,951,523 | 26,551,305 | ||||||||||||||||||||||||||||||||||
| Unrecognized estimated share-based compensation cost | 516,227 | 3,249,083 | ||||||||||||||||||||||||||||||||||||
| Deferred cost is expected to be recognized over a weighted-average vesting period | 1.23 | |||||||||||||||||||||||||||||||||||||
| Unrecognized estimated share-based compensation cost | 37,821,006 | 238,041,628 | ||||||||||||||||||||||||||||||||||||
| Weighted-average vesting period | 2 years 9 months 4 days | 2 years 9 months 4 days | ||||||||||||||||||||||||||||||||||||
| Share based compensation costs, capitalized | $ 13,902 | 87,497 | 295,211 | 1,463,330 | ||||||||||||||||||||||||||||||||||