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Share based compensation (Share Options - Narrative) (Details) ¥ in Thousands |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2008 shares | Dec. 31, 2007 shares | Dec. 31, 2015 | Dec. 31, 2016 CNY (¥) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥)
Share-based Compensation Award, Tranche Two [Member] |  |  |  |  |  |
Share-based compensation [Line Items] |  |  |  |  |  |
Number of equal installments in which award will vest |  |  |  | 2 |  |
Share options [Member] | Pre-2009 Scheme Options [Member] |  |  |  |  |  |
Share-based compensation [Line Items] |  |  |  |  |  |
Vesting period |  |  |  | 4 years |  |
Total intrinsic value of options exercised | ¥ |  |  |  | ¥ 3,270 | ¥ 122,956 | ¥ 134,844
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 |  |  |  | 6 |  |
Share options [Member] | Pre-2009 Scheme Options [Member] | Employees [Member] |  |  |  |  |  |
Share-based compensation [Line Items] |  |  |  |  |  |
Awards granted (in 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) |  | 3,832,290 |  |  |  |
Number of non-employees to whom options were granted |  | 1 |  |  |  |

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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 + Details
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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. + Details
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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 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Percentage of vesting of share-based compensation awards. + 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 + Details
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