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Net Income Per Share (Tables) | 12 Months Ended
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Dec. 31, 2023
Earnings Per Share [Abstract] |
Schedule of Computation of Basic and Diluted Net Income Per Share | The computation of basic and diluted net income per share was as follows:
| Years Ended December 31,
(in millions, except share and per share data) | 2023 |  | 2022 |  | 2021
Net income | $ | 206.3 |  |  | $ | 4.6 |  |  | $ | 16.8 |
Add back interest expense, net of tax attributable to assumed conversion of convertible senior notes | 10.4 |  |  | — |  |  | — |
Net income, diluted | $ | 216.7 |  |  | $ | 4.6 |  |  | $ | 16.8 |
Weighted average number of common shares outstanding, basic (in thousands) | 69,751 |  |  | 69,375 |  |  | 67,698 |
Convertible Notes | 3,528 |  |  | — |  |  | — |
Stock options | 286 |  |  | 454 |  |  | 686 |
Restricted stock units | 68 |  |  | 81 |  |  | 195 |
Weighted average number of common shares outstanding, diluted (in thousands) | 73,633 |  |  | 69,910 |  |  | 68,579 |
Net income per share |  |  |  |  |
Basic | $ | 2.96 |  |  | $ | 0.07 |  |  | $ | 0.25 |
Diluted | $ | 2.94 |  |  | $ | 0.07 |  |  | $ | 0.24 |
Schedule of Potential Common Shares Excluded from Computation of Diluted Net Income per Share | The number of common share equivalents excluded from the computation of diluted net income per share because either the effect would have been anti-dilutive, or the performance criteria related to the units had not yet been met, were as follows:
| Years Ended December 31,
(in thousands) | 2023 |  | 2022 |  | 2021
Restricted stock units | 322 |  |  | 227 |  |  | 166 |
Stock options | 163 |  |  | 137 |  |  | 53 |
0.375% Convertible Senior Notes | — |  |  | 3,528 |  |  | 3,528 |
1.375% Convertible Senior Notes | — |  |  | — |  |  | 2,024 |
Total | 485 |  |  | 3,892 |  |  | 5,771 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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