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Fair Value Measurement (Tables) | 9 Months Ended
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Sep. 30, 2012
Assets Measured at Fair Value on Recurring Basis | Assets measured or disclosed at fair value are summarized below:
|  | Fair value measurements at December 31, 2011 using |  |  | Total fair value at December 31, 2011 |
|  | Quoted prices in active markets for identical assets (Level 1) |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |  |
| RMB |  |  | RMB |  |  | RMB |  |  | RMB |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  | 2,419,726 |  |  |  | — |  |  |  | — |  |  |  | 2,419,726 |
Money market fund |  |  | 192,324 |  |  |  | — |  |  |  | — |  |  |  | 192,324 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed-rate investments |  |  | — |  |  |  | 9,834,275 |  |  |  | — |  |  |  | 9,834,275 |
Adjustable-rate investments |  |  | — |  |  |  | 100,027 |  |  |  | — |  |  |  | 100,027 |
Available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustable-rate investments |  |  | — |  |  |  | 102,682 |  |  |  | — |  |  |  | 102,682 |
|  |  | 2,612,050 |  |  |  | 10,036,984 |  |  |  | — |  |  |  | 12,649,034 |
As of December 31, 2011, certain cost and equity method investments, goodwill and intangible assets were measured using significant unobservable inputs (Level 3) and written down from their carrying value to fair value of nil, with impairment charges incurred and included in earnings.
|  | Fair value measurements at September 30, 2012 using |  |  |  |  |  |  |
|  | Quoted prices in active markets for identical assets (Level 1) |  |  | Significant other observable inputs (Level 2) |  |  | Significant unobservable inputs (Level 3) |  |  | Total fair value at September 30, 2012 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Time deposits |  |  | 538,892 |  |  |  | — |  |  |  | — |  |  |  | 538,892 |  |  |  | 85,745 |
Money market fund |  |  | 141,929 |  |  |  | — |  |  |  | — |  |  |  | 141,929 |  |  |  | 22,583 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Held-to-maturity securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed-rate investments |  |  | — |  |  |  | 14,519,093 |  |  |  | — |  |  |  | 14,519,093 |  |  |  | 2,310,192 |
Adjustable-rate investments |  |  | — |  |  |  | 871,872 |  |  |  | — |  |  |  | 871,872 |  |  |  | 138,727 |
Available-for-sale securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed-rate investments |  |  | — |  |  |  | 250,040 |  |  |  | — |  |  |  | 250,040 |  |  |  | 39,785 |
Adjustable-rate investments |  |  | — |  |  |  | 3,088,156 |  |  |  | — |  |  |  | 3,088,156 |  |  |  | 491,369 |
Long-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed-rate held-to-maturity investments |  |  | — |  |  |  | 506,930 |  |  |  | — |  |  |  | 506,930 |  |  |  | 80,660 |
|  |  | 680,821 |  |  |  | 19,236,091 |  |  |  | — |  |  |  | 19,916,912 |  |  |  | 3,169,061 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19190-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 6 -Footnote 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 + Details
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