Earnings per Share

12 Months Ended

Dec. 31, 2020

NOTE 15—EARNINGS PER SHARE

Earnings per share ("EPS") is presented on both a basic and diluted basis. Basic EPS is based on the weighted average number of common shares outstanding. Diluted EPS reflects the potential dilution that could occur if outstanding securities or other contracts to issue common stock were exercised or converted into common stock.

A reconciliation of the common shares used in the denominator for computing basic and diluted EPS is as follows:


	Year Ended December 31,
(in thousands, except per share amounts)	2020		2019		2018
Weighted average common shares outstanding, used in computing basic earnings per share	66,376		67,837		69,614
Effect of dilutive stock options and restricted stock units	396		656		787
Weighted average common shares outstanding, used in computing diluted earnings per share	66,772		68,493		70,401
Earnings per share of common stock attributable to Columbia Sportswear Company:
Basic	$	1.63	$	4.87	$	3.85
Diluted	$	1.62	$	4.83	$	3.81

Stock options and service-based restricted stock units, and performance-based restricted stock representing 1,122,935, 405,928 and 372,516 shares of common stock for the years ended December 31, 2020, 2019 and 2018, respectively, were outstanding but were excluded from the computation of diluted EPS because their effect would be anti-dilutive under the treasury stock method or because the shares were subject to performance conditions that had not been met.