Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Earnings Per Share, Basic and Diluted [Line Items]
Net income	$ 50.2	$ 58.4
Weighted average common shares outstanding for basic earnings per share computation (in shares)	103,092,225	102,844,397
Dilutive effects of stock-based compensation (in shares)	323,762	195,637
Weighted average common shares outstanding for diluted earnings per common share computation (in shares)	103,415,987	103,040,034
Basic earnings per common share (in dollars per share)	$ 0.49	$ 0.57
Diluted earnings per common share (in dollars per share)	$ 0.49	$ 0.57
Restricted Stock
Earnings Per Share, Basic and Diluted [Line Items]
Anti-dilutive unvested time restricted stock (in shares)	20,395	49,574
Unvested restricted stock
Earnings Per Share, Basic and Diluted [Line Items]
Anti-dilutive unvested time restricted stock (in shares)	828,874	801,061

Earnings Per Share, Basic and Diluted [Line Items]

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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