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Note 19 - Earnings Attributable to Tennant Company Per Share (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
  

2020

  

2019

  

2018

 

Numerator:

            

Net Earnings Attributable to Tennant Company

 $33.7  $45.8  $33.4 

Denominator:

            

Basic - Weighted Average Shares Outstanding

  18,349,724   18,118,486   17,940,438 

Effect of dilutive securities

  285,278   334,659   398,131 

Diluted - Weighted Average Shares Outstanding

  18,635,002   18,453,145   18,338,569 
Basic Earnings per Share $1.84  $2.53  $1.86 

Diluted Earnings per Share

 $1.81  $2.48  $1.82