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Share based compensation (Restricted Share Units - Narrative) (Details) - 2011 Incentive Scheme [Member] - CNY (¥) ¥ in Thousands |  | 1 Months Ended | 12 Months Ended | 15 Months Ended
--- | --- | --- | --- | ---
Sep. 16, 2011 | Oct. 31, 2012 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2012
Share-based compensation [Line Items] |  |  |  |  |  |  |
Shares approved for grants to qualified persons | 43,000,000 |  |  |  |  |  |
Annual increase on the first day of each fiscal year, beginning from 2013 in maximum aggregate number of shares which may be issued pursuant to all awards under the Plan |  | 20,000,000 |  |  |  |  |
Restricted share units [Member] |  |  |  |  |  |  |
Share-based compensation [Line Items] |  |  |  |  |  |  |
Granted (in shares) |  |  | 16,012,644 | 9,912,595 | 29,965,989 |  |
Share-based compensation (benefit) |  |  | ¥ 152,205 | ¥ 130,718 | ¥ 95,792 |  |
Total unrecognized compensation expense |  |  | ¥ 294,041 |  |  |  |
Weighted average period over which unrecognized compensation expense is expected to be recognized |  |  | 1 year 1 month 28 days |  |  |  |
Restricted share units [Member] | Employees [Member] |  |  |  |  |  |  |
Share-based compensation [Line Items] |  |  |  |  |  |  |
Granted (in shares) | 9,097,000 |  | 16,012,644 | 9,912,595 | 29,917,989 | 18,295,221 |
Restricted share units [Member] | Employees [Member] | Minimum [Member] |  |  |  |  |  |  |
Share-based compensation [Line Items] |  |  |  |  |  |  |
Vesting period | 4 years |  | 3 years | 18 months |  | 2 years |
Restricted share units [Member] | Employees [Member] | Maximum [Member] |  |  |  |  |  |  |
Share-based compensation [Line Items] |  |  |  |  |  |  |
Vesting period | 5 years |  | 5 years | 5 years |  | 4 years |
Restricted share units [Member] | Non-employee [Member] |  |  |  |  |  |  |
Share-based compensation [Line Items] |  |  |  |  |  |  |
Granted (in shares) |  |  | 0 | 0 | 48,000 |  | 0
Restricted share units [Member] | Employees and Non Employees [Member] | Minimum [Member] |  |  |  |  |  |  |
Share-based compensation [Line Items] |  |  |  |  |  |  |
Vesting period |  |  |  |  | 3 years |  |
Restricted share units [Member] | Employees and Non Employees [Member] | Maximum [Member] |  |  |  |  |  |  |
Share-based compensation [Line Items] |  |  |  |  |  |  |
Vesting period |  |  |  |  | 5 years |  |

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- Definition 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. + References 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 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References No definition available. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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