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Earnings per Share
 9 Months Ended
Oct. 01, 2022
Earnings Per Share [Abstract]  
Earnings per Share Earnings per Share
Basic and diluted earnings per share (EPS) were calculated as follows:
 Three Months EndedNine Months Ended
 October 1,
2022		October 2,
2021		October 1,
2022		October 2,
2021
(In thousands, except per share amounts)
Net Income Attributable to Kadant$27,487 $20,461 $94,849 $59,886 
Basic Weighted Average Shares11,662 11,580 11,651 11,571 
Effect of Stock Options, Restricted Stock Units and Employee Stock Purchase Plan Shares
38 88 30 73 
Diluted Weighted Average Shares11,700 11,668 11,681 11,644 
Basic Earnings per Share$2.36 $1.77 $8.14 $5.18 
Diluted Earnings per Share$2.35 $1.75 $8.12 $5.14 

The effect of outstanding and unvested restricted stock units (RSUs) of the Company's common stock totaling 4,000 shares in the third quarter of 2022 and 3,000 shares in the third quarter of 2021, 10,000 shares in the first nine months of 2022 and 19,000 in the first nine months 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.