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EARNINGS PER SHARE | 12 Months Ended
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Dec. 31, 2012
EARNINGS PER SHARE |
3. | EARNINGS PER SHARE
The Company considers its unvested share based payment awards, which contain non-forfeitable rights to dividends, participating securities, and includes such participating securities in its computation of earnings per share pursuant to the two-class method. Basic earnings per share for the two classes of stock (common stock and unvested restricted stock) is calculated by dividing net income by the weighted average number of shares of common stock and unvested restricted stock outstanding during the reporting period. Diluted earnings per share is calculated using the weighted average number of shares of common stock and unvested restricted stock plus the potentially dilutive effect of common equivalent shares outstanding determined under both the two class method and the treasury stock method. The following table presents computations of basic and diluted earnings per share under the two class method:
|  | Year ended December 31, |
|  | 2010 |  |  | 2011 |  |  | 2012 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Cinemark Holdings, Inc. |  | $ | 146,120 |  |  | $ | 130,557 |  |  | $ | 168,949 |
Earnings allocated to participating share-based awards (1) |  |  | (1,399 | ) |  |  | (1,458 | ) |  |  | (2,061 | )
Net income attributable to common stockholders |  | $ | 144,721 |  |  | $ | 129,099 |  |  | $ | 166,888 |
Denominator (shares in thousands): |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average common stock outstanding |  |  | 111,565 |  |  |  | 112,736 |  |  |  | 113,216 |
Common equivalent shares for stock options |  |  | 213 |  |  |  | 41 |  |  |  | 36 |
Common equivalent shares for restricted stock units |  |  | 373 |  |  |  | 447 |  |  |  | 572 |
Diluted |  |  | 112,151 |  |  |  | 113,224 |  |  |  | 113,824 |
Basic earnings per share attributable to common stockholders |  | $ | 1.30 |  |  | $ | 1.15 |  |  | $ | 1.47 |
Diluted earnings per share attributable to common stockholders |  | $ | 1.29 |  |  | $ | 1.14 |  |  | $ | 1.47 |
(1) | For the years ended December 31, 2010, 2011 and 2012, a weighted average of approximately 1,076 shares, 1,274 shares and 1,406 shares of unvested restricted stock, respectively, are considered participating securities.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=16381557&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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