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Share-Based Compensation | 6 Months Ended
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Jun. 30, 2025
Share-Based Payment Arrangement [Abstract] |
Share-Based Compensation | Share-Based Compensation Our key employees and non-employee directors have been granted share-based awards through our SICP, which has awards outstanding under the current 2023 plan and the previous 2013 plan. We record these share-based awards as compensation costs over the respective service period for which services are received in exchange for an award of equity or equity-based compensation. The compensation cost is based primarily on the fair value of the shares awarded, using the estimated fair value of each share on the date it was granted, and the number of shares to be issued at the end of the service period. The table below presents the amounts included in net income related to share-based compensation expense for the three and six months ended June 30, 2025 and 2024:
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
(in millions) |  |  |  |  |  |  |  |
Awards to key employees |  | $ | 2.1 |  |  | $ | 2.2 |  |  | $ | 4.2 |  |  | $ | 4.1 |
Awards to non-employee directors |  | 0.2 |  |  | 0.2 |  |  | 0.4 |  |  | 0.4 |
Total compensation expense |  | 2.3 |  |  | 2.4 |  |  | 4.6 |  |  | 4.5 |
Less: tax benefit |  | (0.6) |  |  | (0.6) |  |  | (1.2) |  |  | (1.1) |
Share-based compensation amounts included in net income |  | $ | 1.7 |  |  | $ | 1.8 |  |  | $ | 3.4 |  |  | $ | 3.4 |
Officers and Key Employees Our Compensation Committee is authorized to grant our key employees the right to receive awards of shares of our common stock contingent upon the achievement of established performance goals and subject to SEC transfer restrictions once awarded. Our President and CEO has the right to issue awards of shares of our common stock to other officers and key employees of the Company contingent upon various performance goals and subject to SEC transfer restrictions. We currently have several outstanding multi-year performance awards, which are based upon the successful achievement of long-term goals, growth and financial results and comprise both market-based and performance-based conditions and targets. The fair value per share, tied to a performance-based condition or target, is equal to the market price per share on the grant date. For the market-based conditions, we used the Monte Carlo valuation to estimate the fair value of each share granted. The table below presents the summary of the stock activity for awards to key employees for the six months ended June 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—June 30, 2025 |  | 289 |  |  | $ | 115.69 |
During the six months ended June 30, 2025, we granted awards of 99 thousand shares of common stock to officers and key employees under the SICP, including awards granted in February 2025. The shares granted are multi-year awards that will vest no later than the three-year service period ending December 31, 2027. In March 2025, upon the election by certain of our executive officers and key employees, we withheld shares with a value at least equivalent to each such executive officer’s minimum statutory obligation for applicable income and other employment taxes related to shares that vested and were paid in March 2025 for the performance period ended December 31, 2024. We paid the balance of such awarded shares to each such executive officer and remitted cash equivalent to the withheld shares to the appropriate taxing authorities. We withheld 8 thousand shares based on the value of the shares on their award date. Total combined payments for the employees’ tax obligations to the taxing authorities were approximately $1.0 million. At June 30, 2025, the aggregate intrinsic value of the SICP awards granted to key employees was approximately $34.8 million. At June 30, 2025, there was approximately $11.8 million of unrecognized compensation cost related to these awards, which will be recognized through 2027. Non-employee Directors Shares granted to non-employee directors are issued in advance of the directors’ service periods and are fully vested as of the grant date. We record a deferred expense equal to the fair value of the shares issued and amortize the expense equally over a service period of one year or less. Our directors receive an annual retainer of shares of common stock under the SICP for services rendered through the subsequent Annual Meeting of Shareholders. Accordingly, our directors that served on the Board as of May 2025 each received approximately 1 thousand shares of common stock, respectively, with a weighted average fair value of $134.05 per share. At June 30, 2025, there was $0.8 million of unrecognized compensation expense related to shares granted to non-employee directors. This expense will be recognized over the remaining service period ending in May 2026.

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