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Earnings per Share (Tables) | 9 Months Ended
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Sep. 30, 2023
Earnings Per Share [Abstract] |
Summary of Earnings Per Share |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Numerator (in millions): |  |  |  |  |  |  |  |  |  |  |  |
Net income available to common stockholders |  | $ | 39.2 |  |  | $ | 38.7 |  |  | $ | 101.3 |  |  | $ | 107.5 |
Denominator (in thousands): |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding |  |  | 24,866 |  |  |  | 24,786 |  |  |  | 24,845 |  |  |  | 24,794 |
Dilutive effect of stock options and awards |  |  | 140 |  |  |  | 179 |  |  |  | 155 |  |  |  | 182 |
Denominator for diluted earnings per share |  |  | 25,006 |  |  |  | 24,965 |  |  |  | 25,000 |  |  |  | 24,976 |
Net income per share, basic: |  | $ | 1.58 |  |  | $ | 1.56 |  |  | $ | 4.08 |  |  | $ | 4.34 |
Net income per share, diluted: |  | $ | 1.57 |  |  | $ | 1.55 |  |  | $ | 4.05 |  |  | $ | 4.30 |

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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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