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Income Attributable to Tennant Company Per Share (Tables) | 12 Months Ended
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Dec. 31, 2024
Earnings Per Share [Abstract] |
Schedule of Computations of Basic and Diluted Earnings per Share | The computations of basic and diluted earnings attributable to Tennant Company per share for the years ended December 31 were as follows:
| 2024 |  | 2023 |  | 2022
Numerator: |  |  |  |  |
Net income | $ | 83.7 |  |  | $ | 109.5 |  |  | $ | 66.3 |
Denominator: |  |  |  |  |
Basic - weighted average shares outstanding | 18,786,871 |  | 18,509,523 |  | 18,494,356
Effect of dilutive securities | 309,267 |  | 274,110 |  | 202,899
Diluted - weighted average shares outstanding | 19,096,138 |  | 18,783,633 |  | 18,697,255
Basic earnings per share | $ | 4.46 |  |  | $ | 5.92 |  |  | $ | 3.58 |
Diluted earnings per share | $ | 4.38 |  |  | $ | 5.83 |  |  | $ | 3.55 |

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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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