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Summary Of Significant Accounting Policies - Additional Information (Detail)
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12 Months Ended | 12 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2011
USD ($)
Year
Entity
Segment
|
Dec. 31, 2011
CNY
|
Dec. 31, 2010
CNY
Entity
|
Dec. 31, 2009
CNY
Entity
|
Dec. 31, 2010
USD ($)
|
Dec. 31, 2008
CNY
|
Dec. 31, 2011
Land Use Rights
Year
|
Dec. 31, 2011
Minimum
|
Dec. 31, 2010
Minimum
|
Dec. 31, 2009
Minimum
|
Dec. 31, 2011
Maximum
|
Dec. 31, 2011
Business Tax
|
Dec. 31, 2011
VAT and related surcharges
|
Dec. 31, 2011
Advertising Expense
USD ($)
|
Dec. 31, 2011
Advertising Expense
CNY
|
Dec. 31, 2010
Advertising Expense
CNY
|
Dec. 31, 2009
Advertising Expense
CNY
|
Dec. 31, 2010
KOK3 game software
CNY
|
Dec. 31, 2009
KOK3 game software
CNY
|
Dec. 31, 2011
Mr Yuzhu Shi
|
Dec. 31, 2011
Capital Lease Obligations
|
Dec. 31, 2011
Non Employee
|
Dec. 31, 2010
Non Employee
|
Dec. 31, 2009
Non Employee
|
Feb. 13, 2008
Stock Repurchase Plan 1
American Depositary Share
USD ($)
|
Dec. 24, 2007
Stock Repurchase Plan 1
American Depositary Share
USD ($)
|
Dec. 31, 2008
Stock Repurchase Plan 1
American Depositary Share
USD ($)
|
Dec. 31, 2007
Stock Repurchase Plan 1
American Depositary Share
USD ($)
|
Aug. 11, 2008
Stock Repurchase Plan 2
American Depositary Share
USD ($)
|
Dec. 31, 2009
Stock Repurchase Plan 2
American Depositary Share
USD ($)
|
Dec. 31, 2008
Stock Repurchase Plan 2
American Depositary Share
USD ($)
|
Aug. 31, 2009
Stock Repurchase Plan 3
American Depositary Share
USD ($)
|
Sep. 30, 2011
Stock Repurchase Plan 4
American Depositary Share
USD ($)
|
Dec. 31, 2011
Stock Repurchase Plan 4
American Depositary Share
USD ($)
|
Dec. 31, 2011
Stock Repurchase Plan 4
American Depositary Share
CNY
|
Dec. 31, 2011
Online Game Product Development Costs
|
Dec. 31, 2011
Online Game Product Development Costs
Minimum
|
Dec. 31, 2011
Online Game Product Development Costs
Maximum
|
Dec. 31, 2011
Salvage Value
|
Dec. 31, 2009
Shenzhen Tencent Computer Systems Company Limited
Year
|
Dec. 31, 2011
Shanghai Giant Network Technology Co Ltd
USD ($)
|
Dec. 31, 2011
Shanghai Giant Network Technology Co Ltd
CNY
|
Dec. 31, 2010
Shanghai Giant Network Technology Co Ltd
CNY
|
Dec. 31, 2009
Shanghai Giant Network Technology Co Ltd
CNY
|
Dec. 31, 2011
Shanghai Giant Network Technology Co Ltd
Contract Termination
CNY
|
Dec. 31, 2011
Shanghai Zhengtu Information Technology Co.Ltd
USD ($)
|
Dec. 31, 2011
Shanghai Zhengtu Information Technology Co.Ltd
CNY
|
Dec. 31, 2010
Shanghai Zhengtu Information Technology Co.Ltd
CNY
|
Dec. 31, 2009
Shanghai Zhengtu Information Technology Co.Ltd
CNY
|
Dec. 31, 2011
Group's VIE subsidiary
|
Dec. 31, 2011
Hangzhou Snow Wolf Software Co Ltd
Online software game
Year
|
Dec. 31, 2011
Beijing Julun Network Information Technology Co Ltd
Online software game
Year
|
Dec. 31, 2011
Resources SZITIE Trust Co Ltd
Held-to-maturity Security
|
Dec. 31, 2011
Resources SZITIE Trust Co Ltd
Held-to-maturity Security
Minimum
|
Dec. 31, 2011
Resources SZITIE Trust Co Ltd
Held-to-maturity Security
Maximum
|
Dec. 31, 2011
China Railway Trust
Held-to-maturity Security
|
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| Significant Accounting Policies [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percentage of ownership | 75.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percentage of revenue for upfront and royalty fees | 24.00% | 65.00% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Number of game series | 4 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Termination notice period | 6 months | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Penalty fee payable | 20,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Technical and consulting services and software licenses fees | 234,000,000 | 1,474,000,000 | 1,135,000,000 | 989,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Exercise price of the option to purchase equity interest | 10,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share capital | 1,588,840 | 10,000,000 | 10,000,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated loss | 11,675,742 | 73,485,950 | 127,393,934 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total Assets | 112,248,055 | 706,478,031 | 587,825,321 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total Liabilities | 112,309,542 | 706,865,023 | 574,594,639 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net increase in cash and cash equivalents | (290,219,942) | (1,826,615,294) | 1,679,781,053 | (599,117,587) | 213,222,000 | 1,342,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Cash and cash equivalents | 150,990,805 | 950,321,028 | 2,776,936,322 | 1,097,155,269 | 441,210,747 | 1,696,272,856 | 14,872,000 | 93,600,000 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Equity Method Investments | 55,831,872 | 351,400,224 | 35,125,945 | 5,291,000 | 33,300,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Other assets | 92,089,000 | 579,600,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other liabilities | 112,315,000 | 706,900,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Noon buying currency exchange rate at Federal Reserve Bank of New York, USD to RMB | 6.2939 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Impairment charge of investment | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cash equivalents maturity period | 90 days | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Short term investments maturity period | 90 days | 365 days | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percentage of estimated residual value of Fixed assets | 5.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Intangible assets, capitalization cost | 5,402,000 | 34,002,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Method of amortization of Purchased software | Amortization is computed using the straight-line method over three years. | Amortization is computed using the straight-line method over three years. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Estimated useful life of Purchased software | 3 | 3 | 4 | 4 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Number of intangible assets | 1 | 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Impairment of intangible assets | 46,557,669 | 46,557,669 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill impairment losses | 0 | 0 | 0 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Land use rights agreements, term | 50 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prepaid card expiration period | 2 years | 2 years | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Description of prepaid card return policy | The Group has implemented a return policy for distributors to return cards that are unsold six months after purchased from the Group. | The Group has implemented a return policy for distributors to return cards that are unsold six months after purchased from the Group. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Online Software Cooperation Agreement, Period | 3 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percentage of business tax and related surcharges | 5.00% | 5.00% | 5.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business tax and surcharges | 17,665,622 | 111,185,658 | 85,019,261 | 72,701,726 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percentage of taxes and other charges included in cost of services | 0.50% | 0.30% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business tax, VAT and related surcharges | 11,567,548 | 72,804,988 | 37,192,656 | 39,066,834 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sales and marketing | 27,007,347 | 169,981,540 | 143,006,150 | 119,600,377 | 16,732,000 | 105,308,000 | 65,297,000 | 31,426,000 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Share options issued | 60,000 | 60,000 | 0 | 0 | 0 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Lease Description | For the lessee, a lease is a capital lease if any of the following conditions exist: a) ownership is transferred to the lessee by the end of the lease term, b) there is a bargain purchase option, c) the lease term is at least 75% of the property’s estimated remaining economic life or d) the present value of the minimum lease payments at the beginning of the lease term is 90% or more of the fair value of the leased property to the lessor at the inception date. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percentage of estimated remaining economic life for lease term | 75.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percentage of fair value of leased property | 90.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Unrecognized tax benefit | 7,062,636 | 44,451,522 | 14,758,798 | 9,955,138 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Amount of shares authorized to be repurchased, ADSs | 200,000,000 | 150,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share repurchased during the period | 17,484,100 | 16,055,000 | 1,429,100 | 932,972 | 932,972 | |||||||||||||||||||||||||||||||||||||||||||||||||||
| Amount of share repurchased during the period | 337,235,151 | 2,122,524,316 | 2,176,792,033 | 200,000,000 | 182,700,000 | 17,300,000 | 3,648,097 | 22,960,759 | ||||||||||||||||||||||||||||||||||||||||||||||||
| Amount of share to be repurchased additionally | 150,000,000 | 50,000,000 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share repurchased during the period | 1,570,785 | 14,947,200 | 932,972 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Amount of share repurchased during the period | $ 9,200,000 | $ 97,800,000 | $ 3,600,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Number of reportable segments | 1 | 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Investment expected yield (net) | 3.00% | 14.00% | 19.50% | 9.10% | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Investment maturity period | 5 years | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Percentage of group's revenue derived from a single online game | 90.00% | 90.00% | 90.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Customer represented 10% or more of net sales | 0 | 0 | 0 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
| Depreciation of the U.S. dollar against RMB | 3.30% | 3.30% | 4.60% | |||||||||||||||||||||||||||||||||||||||||||||||||||||