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Earnings per Share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | A reconciliation of the common shares used in the denominator for computing basic and diluted EPS is as follows (in thousands, except per share amounts):
|  | Year Ended December 31,
|  | 2017 |  | 2016 |  | 2015
Weighted average common shares outstanding, used in computing basic earnings per share |  | 69,759 |  |  | 69,683 |  |  | 70,162 |
Effect of dilutive stock options and restricted stock units |  | 694 |  |  | 949 |  |  | 902 |
Weighted-average common shares outstanding, used in computing diluted earnings per share |  | 70,453 |  |  | 70,632 |  |  | 71,064 |
Earnings per share of common stock attributable to Columbia Sportswear Company: |  |  |  |  |  |
Basic |  | $ | 1.51 |  |  | $ | 2.75 |  |  | $ | 2.48 |
Diluted |  | 1.49 |  |  | 2.72 |  |  | 2.45 |

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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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