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Assets, Liabilities and Results of Operations of VIEs and Their Subsidiaries Included in Company's Consolidated Balance Sheets and Statements of Comprehensive Income (Detail) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 USD ($) | Dec. 31, 2011 CNY | Dec. 31, 2010 CNY | Dec. 31, 2009 CNY | Dec. 31, 2011 Variable Interest Entity, Primary Beneficiary USD ($) | Dec. 31, 2011 Variable Interest Entity, Primary Beneficiary CNY | Dec. 31, 2010 Variable Interest Entity, Primary Beneficiary CNY | Dec. 31, 2009 Variable Interest Entity, Primary Beneficiary CNY
Variable Interest Entity [Line Items] |  |  |  |  |  |  |  |
Total assets | $ 3,708,439 | 23,340,541 | 11,048,439 |  | $ 287,387 | 1,808,784 | 1,194,045 |
current | 2,518,019 | 15,848,156 | 8,782,447 |  | 160,257 | 1,008,640 | 564,729 |
non-current | 1,190,420 | 7,492,385 | 2,265,992 |  | 127,130 | 800,144 | 629,316 |
Total liabilities | 1,114,576 | 7,015,028 | 2,642,847 |  | 231,387 | 1,456,328 | 852,945 |
current | 700,130 | 4,406,547 | 2,551,847 |  | 213,265 | 1,342,268 | 766,945 |
non-current | 414,446 | 2,608,481 | 91,000 |  | 18,122 | 114,060 | 86,000 |
Total revenues | 2,303,943 | 14,500,786 | 7,915,074 | 4,447,776 | 668,159 | 4,205,327 | 1,832,629 | 934,814
Net income | $ 1,051,862 | 6,620,318 | 3,525,168 | 1,485,104 | $ 18,954 | 119,294 | 46,234 | 27,263

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