Consolidated Statements Of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock Par Value	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2019	$ 641.6	$ 66.9	$ 228.6	$ 528.2	$ (93.0)	$ (89.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	96.2			96.2
Total other comprehensive income (loss)	(2.6)					(2.6)
Cash dividends declared	(19.4)			(19.4)
Stock-based payments:
Stock-based compensation	7.8		7.8
Stock option exercises and other	(4.9)	0.7	4.6		(10.2)
Performance share unit transactions	(2.9)	0.2	(0.2)		(2.9)
Stock repurchase program	(13.7)				(13.7)
Ending Balance at Dec. 31, 2020	702.1	67.8	240.8	605.0	(119.8)	(91.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	100.6			100.6
Total other comprehensive income (loss)	17.5					17.5
Cash dividends declared	(22.0)			(22.0)
Stock-based payments:
Stock-based compensation	7.0		7.0
Stock option exercises and other	(2.0)	0.9	9.1		(12.0)
Performance share unit transactions	(3.8)	0.2	(0.2)		(3.8)
Stock repurchase program	(15.4)				(15.4)
Ending Balance at Dec. 31, 2021	784.0	68.9	256.7	683.6	(151.0)	(74.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	120.4			120.4
Total other comprehensive income (loss)	(9.8)					(9.8)
Cash dividends declared	(21.8)			(21.8)
Stock-based payments:
Stock-based compensation	9.5		9.5
Stock option exercises and other	(4.0)	0.5	5.7		(10.2)
Performance share unit transactions	(1.3)	0.1	(0.1)		(1.3)
Stock repurchase program	(16.1)				(16.1)
Ending Balance at Dec. 31, 2022	$ 860.9	$ 69.5	$ 271.8	$ 782.2	$ (178.6)	$ (84.0)