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EARNINGS PER SHARE (Tables) | 12 Months Ended
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Dec. 31, 2014
EARNINGS PER SHARE [Abstract] |
Calculation of Basic and Diluted Earnings Per Share |
|  | For the years ended |
|  | 2012 |  |  | 2013 |  |  | 2014 |
|  | RMB |  |  | RMB |  |  | RMB |  |  | RMB |  |  | US$ |  |  | RMB |  |  | US$ |
|  | Class B |  |  | Class A |  |  | Class B |  |  | Class A |  |  | Class A |  |  | Class B |  |  | Class B |
Earnings per share—basic: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net income attributable to ordinary shareholders used in calculating income per ordinary share—basic |  |  | 4,243 |  |  |  | 2,758 |  |  |  | 103,296 |  |  |  | 74,478 |  |  |  | 12,004 |  |  |  | 82,571 |  |  |  | 13,309 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of ordinary shares outstanding used in calculating basic earnings per share |  |  | 229,374,777 |  |  |  | 6,198,153 |  |  |  | 232,144,532 |  |  |  | 161,137,587 |  |  |  | 161,137,587 |  |  |  | 178,645,232 |  |  |  | 178,645,232 |
Denominator used for earnings per share |  |  | 229,374,777 |  |  |  | 6,198,153 |  |  |  | 232,144,532 |  |  |  | 161,137,587 |  |  |  | 161,137,587 |  |  |  | 178,645,232 |  |  |  | 178,645,232 |
Earnings per share—basic |  |  | 0.02 |  |  |  | 0.45 |  |  |  | 0.45 |  |  |  | 0.46 |  |  |  | 0.07 |  |  |  | 0.46 |  |  |  | 0.07 |
Earnings per share—diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocation of net income attributable to ordinary shareholders used in calculating income per ordinary share— diluted |  |  | 4,243 |  |  |  | 10,875 |  |  |  | 95,179 |  |  |  | 78,445 |  |  |  | 12,643 |  |  |  | 78,604 |  |  |  | 12,670 |
Reallocation of net income attributable to ordinary shareholders as a result of conversion of Class B to Class A shares |  |  | - |  |  |  | 95,179 |  |  |  | - |  |  |  | 78,604 |  |  |  | 12,670 |  |  |  | - |  |  |  | - |
Net income attributable to ordinary shareholders |  |  | 4,243 |  |  |  | 106,054 |  |  |  | 95,179 |  |  |  | 157,049 |  |  |  | 25,313 |  |  |  | 78,604 |  |  |  | 12,670 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of ordinary shares outstanding used in calculating basic earnings per share |  |  | 229,374,777 |  |  |  | 6,198,153 |  |  |  | 232,144,532 |  |  |  | 161,137,587 |  |  |  | 161,137,587 |  |  |  | 178,645,232 |  |  |  | 178,645,232 |
Conversion of Class B to Class A ordinary shares |  |  | - |  |  |  | 232,144,532 |  |  |  | - |  |  |  | 178,645,232 |  |  |  | 178,645,232 |  |  |  | - |  |  |  | - |
Share options |  |  | 4,303,704 |  |  |  | 21,386,682 |  |  |  | - |  |  |  | 18,065,885 |  |  |  | 18,065,885 |  |  |  | - |  |  |  | - |
Denominator used for earnings per share |  |  | 233,678,481 |  |  |  | 259,729,367 |  |  |  | 232,144,532 |  |  |  | 357,848,704 |  |  |  | 357,848,704 |  |  |  | 178,645,232 |  |  |  | 178,645,232 |
Earnings per share—diluted |  |  | 0.02 |  |  |  | 0.41 |  |  |  | 0.41 |  |  |  | 0.44 |  |  |  | 0.07 |  |  |  | 0.44 |  |  |  | 0.07 |
Earnings per ADS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator used for earnings per ADS - basic |  |  | - |  |  |  | 619,815 |  |  |  | - |  |  |  | 16,113,759 |  |  |  | 16,113,759 |  |  |  | - |  |  |  | - |
Denominator used for earnings per ADS - diluted |  |  | - |  |  |  | 25,972,937 |  |  |  | - |  |  |  | 35,784,870 |  |  |  | 35,784,870 |  |  |  | - |  |  |  | - |
Earnings per ADS - basic |  |  | - |  |  |  | 4.45 |  |  |  | - |  |  |  | 4.62 |  |  |  | 0.74 |  |  |  | - |  |  |  | - |
Earnings per ADS - diluted |  |  | - |  |  |  | 4.08 |  |  |  | - |  |  |  | 4.39 |  |  |  | 0.71 |  |  |  | - |  |  |  | - |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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