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Share-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2025
Shares awarded to non-employee directors [Line Items] |
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan | The table below presents the amounts included in net income related to share-based compensation expense for the three and nine months ended September 30, 2025 and 2024:
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
(in millions) |  |  |  |  |  |  |  |
Awards to key employees |  | $ | 1.1 |  |  | $ | 1.7 |  |  | $ | 5.3 |  |  | $ | 5.8 |
Awards to non-employee directors |  | 0.3 |  |  | 0.2 |  |  | 0.7 |  |  | 0.6 |
Total compensation expense |  | 1.4 |  |  | 1.9 |  |  | 6.0 |  |  | 6.4 |
Less: tax benefit |  | (0.4) |  |  | (0.5) |  |  | (1.6) |  |  | (1.6) |
Share-based compensation amounts included in net income |  | $ | 1.0 |  |  | $ | 1.4 |  |  | $ | 4.4 |  |  | $ | 4.8 |
Award to key employees [Member] |
Shares awarded to non-employee directors [Line Items] |
Schedule of Share-based Compensation, Activity | The table below presents the summary of the stock activity for awards to key employees for the nine months ended September 30, 2025:
(in thousands, except per share data) |  | Number of Shares |  | Weighted Average Fair Value/Share
Outstanding—December 31, 2024 |  | 253 |  |  | $ | 117.96 |
Granted |  | 99 |  |  | $ | 125.56 |
Vested |  | (37) |  |  | $ | 129.76 |
Expired |  | (26) |  |  | $ | 113.34 |
Outstanding—September 30, 2025 |  | 289 |  |  | $ | 115.63 |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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