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Earnings per Share
 9 Months Ended
Sep. 26, 2020
Earnings Per Share [Abstract]  
Earnings per Share Earnings per Share
Basic and diluted earnings per share (EPS) are calculated as follows:
 Three Months EndedNine Months Ended
 September 26,
2020		September 28,
2019		September 26,
2020		September 28,
2019
(In thousands, except per share amounts)
Net Income Attributable to Kadant$14,851 $16,115 $38,989 $43,319 
Basic Weighted Average Shares11,504 11,267 11,472 11,198 
Effect of Stock Options, Restricted Stock Units and Employee Stock Purchase Plan Shares
85 202 78 236 
Diluted Weighted Average Shares11,589 11,469 11,550 11,434 
Basic Earnings per Share$1.29 $1.43 $3.40 $3.87 
Diluted Earnings per Share$1.28 $1.41 $3.38 $3.79 

The effect of outstanding and unvested restricted stock units (RSUs) of the Company's common stock totaling 11,000 shares in the third quarter of 2020, 8,000 shares in the third quarter of 2019, 30,000 shares in the first nine months of 2020, and 32,000 shares in the first nine months of 2019 was not included in the computation of diluted EPS for the respective periods as the effect would have been antidilutive or, for unvested performance-based RSUs, the performance conditions had not been met as of the end of the reporting periods.