Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	AOCI Attributable to Parent
Beginning Balance at Dec. 31, 2023	$ 591.8	$ 0.6	$ 591.7	$ 1,346.6	$ (1,242.4)	$ (104.7)	[1],[2]
Balance, shares at Dec. 31, 2023		43,902,061
Balance, shares at Dec. 31, 2023					19,152,279
Stock issuance, net, shares		17,892
Cash dividends - per common share	(12.4)			(12.4)
Share-based employee compensation	3.6		3.6
Net earnings	59.9			59.9
Other comprehensive income (loss)	(0.9)					(0.9)
Acquisition of treasury stock	(15.2)				$ (15.2)
Acquisition of treasury stock, shares		(142,582)			142,582
Ending Balance at Mar. 31, 2024	626.8	$ 0.6	595.3	1,394.1	$ (1,257.6)	(105.6)	[1],[2]
Balance, shares at Mar. 31, 2024		43,777,371
Balance, shares at Mar. 31, 2024					19,294,861
Beginning Balance at Dec. 31, 2024	$ 757.1	$ 0.6	604.0	1,560.7	$ (1,298.0)	(110.2)	[1],[2]
Balance, shares at Dec. 31, 2024	43,561,649	43,561,649
Balance, shares at Dec. 31, 2024					19,614,358
Stock issuance, net, shares		13,145
Cash dividends - per common share	$ (13.5)			(13.5)
Share-based employee compensation	3.5		3.5
Net earnings	69.1			69.1
Other comprehensive income (loss)	(0.6)					(0.6)
Acquisition of treasury stock	(22.2)				$ (22.2)
Acquisition of treasury stock, shares		(149,876)			149,876
Ending Balance at Mar. 31, 2025	$ 793.4	$ 0.6	$ 607.5	$ 1,616.3	$ (1,320.2)	$ (110.8)	[1],[2]
Balance, shares at Mar. 31, 2025	43,424,918	43,424,918
Balance, shares at Mar. 31, 2025					19,764,234

[1] Amounts are net of tax.

[2] Amounts include our 50% share of AOCI components from our WAVE joint venture.