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Net Income Per Share (Tables) | 6 Months Ended
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Jun. 30, 2022
Earnings Per Share [Abstract] |
Reconciliation of the Common and Potential Common Shares Outstanding Used in Earnings Per Share Calculation | he following table is a reconciliation of the average number of common and potential common shares outstanding used in the calculations of basic and diluted net income per share (in millions, shares in thousands):
| Three Months Ended |  | Six Months Ended
| June 30, 2022 |  | June 30, 2021 |  | June 30, 2022 |  | June 30, 2021
Numerator (basic and diluted): |  |  |  |  |  |  |
Net income | $ | 11.8 |  |  | $ | 1.8 |  |  | $ | 13.4 |  |  | $ | 23.4 |
Less: Dividends paid to participating securities | (0.3) |  |  | (0.2) |  |  | (0.5) |  |  | (0.3) |
Less: Undistributed earnings available to participating securities | — |  |  | 0.1 |  |  | — |  |  | — |
Undistributed and distributed earnings available to common stockholders | $ | 11.5 |  |  | $ | 1.7 |  |  | $ | 12.9 |  |  | $ | 23.1 |
Denominator: |  |  |  |  |  |  |
Average number of common shares outstanding | 31,260.1 |  |  | 31,045.1 |  |  | 31,209.3 |  |  | 31,009.9 |
Effect of dilutive stock-based compensation | 149.7 |  |  | 357.3 |  |  | 202.7 |  |  | 361.8 |
Average number of common and potential common shares outstanding | 31,409.8 |  |  | 31,402.4 |  |  | 31,412.0 |  |  | 31,371.7 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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