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Income Attributable to Tennant Company Per Share (Tables) | 6 Months Ended
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Jun. 30, 2025
Earnings Per Share [Abstract] |
Schedule of Computations of Basic and Diluted Earnings per Share | The computations of basic and diluted earnings per share were as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2025 |  | 2024 |  | 2025 |  | 2024
Numerator: |  |  |  |  |  |  |
Net income | $ | 20.2 |  |  | $ | 27.9 |  |  | $ | 33.3 |  |  | $ | 56.3 |
Denominator: |  |  |  |  |  |  |
Basic - weighted average shares outstanding | 18,508,758 |  | 18,896,361 |  | 18,605,187 |  | 18,780,995
Effect of dilutive securities | 179,160 |  | 310,440 |  | 215,111 |  | 360,279
Diluted - weighted average shares outstanding | 18,687,918 |  | 19,206,801 |  | 18,820,298 |  | 19,141,274
Basic earnings per share | $ | 1.10 |  |  | $ | 1.47 |  |  | $ | 1.79 |  |  | $ | 2.99 |
Diluted earnings per share | $ | 1.08 |  |  | $ | 1.45 |  |  | $ | 1.77 |  |  | $ | 2.94 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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