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Cost of Revenues - Schedule of Cost of Revenues (Detail) In Thousands, unless otherwise specified	9 Months Ended			12 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2014 CNY	Sep. 30, 2013 CNY	Dec. 31, 2013 USD ($)	Dec. 31, 2013 CNY	Dec. 31, 2012 CNY	Dec. 31, 2011 CNY
Income Statement [Abstract]
Content related costs	$ 14,357	88,121	56,995	$ 15,856	95,987	62,871	43,943
Depreciation and amortization	3,770	23,143	18,813	4,367	26,439	21,978	18,739
Bandwidth and internet data center	3,747	23,000	14,314	3,477	21,047	15,045	11,936
Value-added taxes, business taxes and surcharges	20,251	124,299	74,296	17,966	108,763	78,346	55,947
Cost of revenues	$ 42,125	258,563	164,418	$ 41,666	252,236	178,240	130,565

X

- Definition

The item represents thee fees that we pay to telecommunication carriers and other service providers for telecommunication services and for hosting our servers at their internet data centers, as well as fees we pay to our content delivery network service provider for the distribution of our content.

+ References

No definition available.

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X

- Definition

The aggregate cost of goods produced and sold and services rendered during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 2

-Article 5

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- Definition

Depreciation of property, plant and equipment directly related to services rendered by an entity during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- Definition

Payroll costs incurred (including equity-based compensation) that are directly related to services rendered by an entity during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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- Definition

Taxes and licenses incurred and are directly related to services rendered by an entity during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(d))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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