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Capital Stock and Equity Compensation (Tables)

3 Months Ended

Mar. 31, 2026

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Schedule of Share-Based Payment Arrangement, Expensed and Capitalized, Amount

The components of equity compensation expense were as follows:

			Three Months Ended
(Dollars in millions)			March 31, 2026						March 31, 2025
Performance-based restricted stock units expense			$	—					$	1.8
Time-based restricted stock units expense			1.3						1.7
Deferred stock units expense			0.3						0.1
Other			0.1						—
Total equity compensation expense			$	1.7					$	3.6

Schedule of Weighted-Average Assumptions Used

The following table sets forth the assumptions used in the Monte Carlo calculation for each material award granted in 2026 and 2025:

			February 18, 2026						February 12, 2026						February 26, 2025
Expected volatility			34.7%						34.6%						45.6%
Expected term (in years)			2.9 years						2.9 years						2.9 years
Risk-free interest rate			3.44%						3.43%						4.28%

Schedule of Restricted Stock and Restricted Stock Activity

A summary of activity of the outstanding performance-based restricted stock units for the three months ended March 31, 2026 is presented below:

			Performance-Based Restricted Stock Units
Awards outstanding as of December 31, 2025			109,916
Awards granted			39,560
Stock issued			—
Awards forfeited/cancelled			(56,599)
Awards outstanding as of March 31, 2026			92,877

A summary of activity of the outstanding time-based restricted stock units for the three months ended March 31, 2026 is presented below:

			Time-Based Restricted Stock Units
Awards outstanding as of December 31, 2025			115,905
Awards granted			53,307
Stock issued			(40,457)
Awards forfeited/cancelled			(17,306)
Awards outstanding as of March 31, 2026			111,449

A summary of activity of the outstanding deferred stock units for the three months ended March 31, 2026 is presented below:

			Deferred Stock Units
Awards outstanding as of December 31, 2025			23,566
Awards granted			—
Stock issued			(536)
Awards outstanding as of March 31, 2026			23,030

X

- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

+ References

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-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

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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

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-Topic 718
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-Publisher FASB
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- Definition

Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

+ References

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-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-Publisher FASB
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