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Earnings Attributable to Tennant Company Per Share (Tables)
3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings (Loss) per Share
The computations of Basic and Diluted Earnings per Share were as follows:
 
Three Months Ended
 
March 31
 
2019
 
2018
Numerator:
 
 
 
Net Earnings Attributable to Tennant Company
$
5.4

 
$
3.3

Denominator:
 
 
 
Basic - Weighted Average Shares Outstanding
18,042,468

 
17,790,989

Effect of dilutive securities:
 
 
 
Share-based compensation plans
302,743

 
454,370

Diluted - Weighted Average Shares Outstanding
18,345,211

 
18,245,359

Basic Earnings per Share
$
0.30

 
$
0.18

Diluted Earnings per Share
$
0.29

 
$
0.18