Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section F

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

No definition available.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

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- Definition

Number of individuals to whom awards were granted under the equity-based compensation plan.

+ References

No definition available.

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- Definition

Number of equal installments in which awards granted under the equity-based compensation plan will vest over the specified period.

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No definition available.

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Share based compensation (Share Options - Narrative) (Details) ¥ in Thousands				12 Months Ended
	Nov. 21, 2012 $ / shares	Dec. 31, 2008 shares	Dec. 31, 2007 item shares	Dec. 31, 2015 CNY (¥) item	Dec. 31, 2014 CNY (¥)	Dec. 31, 2013 CNY (¥)
Pre-2009 Scheme Options [Member] \| Employees [Member]
Share-based compensation [Line Items]
Unrecognized compensation cost and expense
Pre-2009 Scheme Options [Member] \| Non-employee [Member]
Share-based compensation [Line Items]
Unrecognized compensation cost and expense
Share options [Member] \| Non-employee [Member]
Share-based compensation [Line Items]
Weighted average exercise price of option granted (in dollars per share) \| $ / shares
Share options [Member] \| Pre-2009 Scheme Options [Member]
Share-based compensation [Line Items]
Vesting period				4 years
Total intrinsic value of options exercised				¥ 122,956	¥ 134,844	¥ 64,195
Share-based compensation (benefit)						¥ 14,004
Share options [Member] \| Pre-2009 Scheme Options [Member] \| Share-based Compensation Award, Tranche One [Member]
Share-based compensation [Line Items]
Vesting rate				25.00%
Share options [Member] \| Pre-2009 Scheme Options [Member] \| Share-based Compensation Award, Tranche Two [Member]
Share-based compensation [Line Items]
Vesting period				36 months
Vesting rate				75.00%
Number of equal installments in which award will vest \| item				6
Share options [Member] \| Pre-2009 Scheme Options [Member] \| Employees [Member]
Share-based compensation [Line Items]
Awards granted (in shares) \| shares		8,499,050	12,705,700
Share options [Member] \| Pre-2009 Scheme Options [Member] \| Non-employee [Member]
Share-based compensation [Line Items]
Awards granted (in shares) \| shares			3,832,290
Number of non-employees to whom options were granted \| item			1