v3.25.2
Income Attributable to Tennant Company Per Share - Schedule of Computations of Basic and Diluted Earnings per Share (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Numerator:        
Net income $ 20.2 $ 27.9 $ 33.3 $ 56.3
Denominator:        
Basic - weighted average shares outstanding (in shares) 18,508,758 18,896,361 18,605,187 18,780,995
Effect of dilutive securities (in shares) 179,160 310,440 215,111 360,279
Diluted - weighted average shares outstanding (in shares) 18,687,918 19,206,801 18,820,298 19,141,274
Basic earnings per share (in dollars per share) $ 1.10 $ 1.47 $ 1.79 $ 2.99
Diluted earnings per share (in dollars per share) $ 1.08 $ 1.45 $ 1.77 $ 2.94