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Stock-Based Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The following table summarizes the Company's stock-based compensation expense included as a component of general and administrative expenses in the Consolidated Financial Statements:
| Year Ended December 31,
| 2024 |  | 2023 |  | 2022
| (In millions)
Stock-based compensation expense |  |  |  |  |
Equity classified awards expense | $ | 16.0 |  |  | $ | 12.0 |  |  | $ | 16.2 |
Liability classified awards expense | 0.3 |  |  | (1.4) |  |  | 1.4 |
Total stock-based compensation expense | 16.3 |  | 10.6 |  | 17.6
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The following table summarizes the assumptions used in the Black-Scholes model for stock options granted in the years ended December 31, 2024, 2023 and 2022:
| 2024 |  | 2023 |  | 2022
Risk free interest rate | 4.3 | % |  | 4.4 | % |  | 1.7 | %
Weighted average historical volatility | 70.2 | % |  | 70.9 | % |  | 70.1 | %
Dividend yield | 4.2 | % |  | 2.7 | % |  | 2.6 | %
Expected years until exercise | 4.5 |  | 4.5 |  | 4.5
Weighted average fair value of options granted | $ | 22.26 |  |  | $ | 37.35 |  |  | $ | 33.23 |
Schedule of Share-based Compensation, Stock Options, Activity | Stock option activity for the years ended December 31, 2024, 2023 and 2022 is summarized as follows:
| Number of Shares Under Option |  | Weighted Average Exercise Price Per Share |  | Weighted Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value (in millions)
Outstanding at December 31, 2021 | 475,904 |  |  | 76.65 |  |  |  |  |
Granted | 75,795 |  |  | 70.08 |  |  |  |  |
Exercised | (3,505) |  |  | 68.80 |  |  |  |  |
Forfeited | (6,171) |  |  | 81.13 |  |  |  |  |
Expired | (2,448) |  |  | 94.43 |  |  |  |  |
Outstanding at December 31, 2022 | 539,575 |  |  | 75.65 |  |  |  |  |
Granted | 74,390 |  |  | 74.94 |  |  |  |  |
Exercised | (69,443) |  |  | 54.90 |  |  |  |  |
Forfeited | (20,876) |  |  | 79.11 |  |  |  |  |
Expired | (61,140) |  |  | 82.47 |  |  |  |  |
Outstanding at December 31, 2023 | 462,506 |  |  | 77.59 |  |  |  |  |
Granted | 133,729 |  |  | 49.06 |  |  |  |  |
Exercised | — |  |  | — |  |  |  |  |
Forfeited | (14,717) |  |  | 56.03 |  |  |  |  |
Expired | (56,872) |  |  | 87.07 |  |  |  |  |
Outstanding at December 31, 2024 | 524,646 |  |  | 69.89 |  |  | 6.01 |  | $ | — |
Vested and Expected to Vest at December 31, 2024 | 509,056 |  |  | $ | 70.38 |  |  | 5.92 |  | $ | — |
Exercisable at December 31, 2024 | 344,411 |  |  | $ | 76.38 |  |  | 4.60 |  | $ | — |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | Activity in equity classified awards of restricted stock and restricted stock units for the years ended December 31, 2024, 2023 and 2022 is as follows:
| Shares of Restricted Stock |  | Weighted Average Grant-Date Per Share Fair Value |  | Restricted Stock Units |  | Weighted Average Grant-Date Per Share Fair Value
Outstanding at December 31, 2021 | 276,611 |  |  | 80.85 |  |  | 105,592 |  |  | 71.00 |
Granted | 201,789 |  |  | 70.12 |  |  | 60,914 |  |  | 49.36 |
Released | (98,864) |  |  | 86.36 |  |  | (42,611) |  |  | 66.63 |
Forfeited | (23,636) |  |  | 75.89 |  |  | — |  |  | — |
Outstanding at December 31, 2022 | 355,900 |  |  | 73.57 |  |  | 123,895 |  |  | 62.11 |
Granted | 211,820 |  |  | 73.12 |  |  | 21,731 |  |  | 74.01 |
Released | (165,533) |  |  | 73.64 |  |  | (47,857) |  |  | 64.04 |
Forfeited | (63,565) |  |  | 73.15 |  |  | (39,294) |  |  | 77.23 |
Outstanding at December 31, 2023 | 338,622 |  |  | 73.33 |  |  | 58,475 |  |  | 54.07 |
Granted | 311,955 |  |  | 47.55 |  |  | 32,630 |  |  | 49.06 |
Released | (155,368) |  |  | 74.37 |  |  | (18,115) |  |  | 73.97 |
Forfeited | (73,750) |  |  | 60.10 |  |  | (37) |  |  | 74.94 |
Outstanding at December 31, 2024 | 421,459 |  |  | $ | 56.18 |  |  | 72,953 |  |  | $ | 46.83 |
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award | The Company has granted cash-settled restricted stock units to certain employees in the past. These instruments are recorded as liabilities at fair value as of the respective period end.
|  | Cash-Settled Restricted Stock Units |
Outstanding at December 31, 2021 |  | 12,799 |  |
Granted |  | 67 |  |
Released |  | (12,866) |  |
Forfeited |  | — |  |
Outstanding at December 31, 2022 |  | — |  |
Outstanding at December 31, 2023 |  | — |  |
Outstanding at December 31, 2024 |  | — |  |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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