Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share, Basic and Diluted [Line Items]
Net income	$ 58.4	$ 56.3
Weighted average common shares outstanding for basic earnings per share computation (in shares)	102,844,397	103,737,664
Dilutive effects of stock-based compensation (in shares)	195,637	81,055
Weighted average common shares outstanding for diluted earnings per common share computation (in shares)	103,040,034	103,818,719
Basic earnings per common share (in dollars per share)	$ 0.57	$ 0.54
Diluted earnings per common share (in dollars per share)	$ 0.57	$ 0.54
Restricted Stock
Earnings Per Share, Basic and Diluted [Line Items]
Anti-dilutive unvested time restricted stock (in shares)	49,574	132,410
Unvested restricted stock
Earnings Per Share, Basic and Diluted [Line Items]
Anti-dilutive unvested time restricted stock (in shares)	801,061	330,408