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Earnings per Share
 3 Months Ended
Apr. 02, 2022
Earnings Per Share [Abstract]  
Earnings per Share Earnings per Share
Basic and diluted earnings per share (EPS) were calculated as follows:
 Three Months Ended
 April 2,
2022		April 3,
2021
(In thousands, except per share amounts)
Net Income Attributable to Kadant$41,192 $16,561 
Basic Weighted Average Shares11,630 11,553 
Effect of Stock Options, Restricted Stock Units and Employee Stock Purchase Plan Shares
25 59 
Diluted Weighted Average Shares11,655 11,612 
Basic Earnings per Share$3.54 $1.43 
Diluted Earnings per Share$3.53 $1.43 

The effect of outstanding and unvested restricted stock units (RSUs) of the Company's common stock totaling 17,000 shares in the first quarter of 2022 and 44,000 shares in the first quarter of 2021 were 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.