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Loss Per Share | 12 Months Ended
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Dec. 31, 2012
Loss Per Share |
19. | Loss Per Share
|  | Year Ended December 31, |
|  | 2012 $ |  |  | 2011 $ |  |  | 2010 $ |
Net loss attributable to stockholders’ of Teekay Corporation |  |  | (160,180 | ) |  |  | (358,616 | ) |  |  | (267,287 | )
Weighted average number of common shares |  |  | 69,263,369 |  |  |  | 70,234,817 |  |  |  | 72,862,617 |
Dilutive effect of stock-based compensation |  |  | — |  |  |  | — |  |  |  | — |
Common stock and common stock equivalents |  |  | 69,263,369 |  |  |  | 70,234,817 |  |  |  | 72,862,617 |
Loss per common share: |  |  |  |  |  |  |  |  |  |  |  |
—Basic |  |  | (2.31 | ) |  |  | (5.11 | ) |  |  | (3.67 | )
—Diluted |  |  | (2.31 | ) |  |  | (5.11 | ) |  |  | (3.67 | )
The anti-dilutive effect attributable to outstanding stock-based compensation excluded from the calculation of diluted loss per common share, for the years ended December 31, 2012, 2011, and 2010 was 3.9 million, 5.7 million and 6.1 million shares, respectively.

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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FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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