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Share based compensation (Tables) | 12 Months Ended
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Dec. 31, 2015
Share-based compensation [Line Items] |
Summary of the restricted shares activity |
|  | Number of restricted shares |  |  | Weighted average grant-date fair value (US$) |
Outstanding, January 1, 2013 |  |  | 18,230,801 |  |  |  | 0.4898 |
Forfeited |  |  | (1,581,789 | ) |  |  | 0.8726 |
Vested |  |  | (11,975,287 | ) |  |  | 0.3906 |
Outstanding, December 31, 2013 |  |  | 4,673,725 |  |  |  | 0.6144 |
Forfeited |  |  | (159,410 | ) |  |  | 0.9362 |
Vested |  |  | (4,514,315 | ) |  |  | 0.6030 |
Outstanding, December 31, 2014 and 2015 |  |  | - |  |  |  | - |
Summary of the restricted share units activity |
|  | Number of restricted shares |  |  | Weighted average grant-date fair value (US$) |
Outstanding, January 1, 2013 |  |  | 26,695,621 |  |  |  | 1.0415 |
Granted |  |  | 29,965,989 |  |  |  | 0.9338 |
Forfeited |  |  | (3,522,992 | ) |  |  | 1.0699 |
Vested |  |  | (8,836,018 | ) |  |  | 1.0429 |
Outstanding, December 31, 2013 |  |  | 44,302,600 |  |  |  | 0.9639 |
Granted |  |  | 9,912,595 |  |  |  | 3.5805 |
Forfeited |  |  | (3,125,430 | ) |  |  | 1.1859 |
Vested |  |  | (12,283,670 | ) |  |  | 1.0144 |
Outstanding, December 31, 2014 |  |  | 38,806,095 |  |  |  | 1.5984 |
Granted |  |  | 16,012,644 |  |  |  | 3.3358 |
Forfeited |  |  | (7,312,548 | ) |  |  | 1.8920 |
Vested |  |  | (11,222,589 | ) |  |  | 1.4374 |
Outstanding, December 31, 2015 |  |  | 36,283,602 |  |  |  | 2.3535 |
Expected to vest at December 31, 2015 |  |  | 34,548,581 |  |  |  | 2.3356 |
Pre-2009 Scheme Options [Member] |
Share-based compensation [Line Items] |
Summary of the activities of the Pre-2009 Scheme Options for employees and non-employee |
|  | Number of options |  |  | Weighted average exercise price (US$) |  |  | Weighted average remaining contractual life (years) |  |  | Aggregate intrinsic value (US$) |
Outstanding, January 1, 2013 |  |  | 17,870,425 |  |  |  | 0.0055 |  |  |  | 5.37 |  |  |  | 12,642 |
Exercised |  |  | (4,648,420 | ) |  |  | 0.0045 |  |  |  | 4.30 |  |  |  |  |
Outstanding, December 31, 2013 |  |  | 13,222,005 |  |  |  | 0.0059 |  |  |  | 4.40 |  |  |  | 33,162 |
Exercised |  |  | (5,841,660 | ) |  |  | 0.0057 |  |  |  | 3.24 |  |  |  |  |
Outstanding, vested and exercisable, December 31, 2014 |  |  | 7,380,345 |  |  |  | 0.0061 |  |  |  | 3.52 |  |  |  | 22,959 |
Exercised |  |  | (6,611,970 | ) |  |  | 0.0061 |  |  |  | 2.46 |  |  |  |  |
Outstanding, vested and exercisable, December 31, 2015 |  |  | 768,375 |  |  |  | 0.0067 |  |  |  | 2.99 |  |  |  | 2,395 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock 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 (c) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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)(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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