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Earnings Per Common Share (Tables) | 9 Months Ended
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Sep. 30, 2024
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | The following table sets forth the computation of basic and diluted earnings per common share for the periods indicated:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2024 |  | 2023 |  | 2024 |  | 2023
Numerator for basic and diluted earnings per common share: |  |  |  |  |  |  |  |
Net income attributable to L.B. Foster Company |  | $ | 35,905 |  |  | $ | 515 |  |  | $ | 43,188 |  |  | $ | 1,894 |
Denominator: |  |  |  |  |  |  |  |
Weighted average shares outstanding |  | 10,718 |  |  | 10,813 |  |  | 10,757 |  |  | 10,804 |
Denominator for basic earnings per common share |  | 10,718 |  |  | 10,813 |  |  | 10,757 |  |  | 10,804 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Stock compensation plans |  | 274 |  |  | 160 |  |  | 302 |  |  | 91 |
Dilutive potential common shares |  | 274 |  |  | 160 |  |  | 302 |  |  | 91 |
Denominator for diluted earnings per common share - adjusted weighted average shares outstanding |  | 10,992 |  |  | 10,973 |  |  | 11,059 |  |  | 10,895 |
Basic earnings per common share |  | $ | 3.35 |  |  | $ | 0.05 |  |  | $ | 4.01 |  |  | $ | 0.18 |
Diluted earnings per common share |  | $ | 3.27 |  |  | $ | 0.05 |  |  | $ | 3.91 |  |  | $ | 0.17 |

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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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