CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net sales	$ 1,029.0	$ 946.9	$ 896.9
Cost of sales	672.1	621.2	589.2
Gross profit	356.9	325.7	307.7
Selling, distribution and administrative expenses	272.8	260.4	245.2
Special (gains) charges, net	0.0	(0.8)	0.8
Operating income from continuing operations	84.1	66.1	61.7
Foreign currency exchange loss	0.0	0.0	0.4
Interest and other (income) expense, net	0.1	0.0	(1.6)
Income from continuing operations before income taxes	84.0	66.1	62.9
Provision for income taxes	19.9	16.1	13.4
Net income from continuing operations	64.1	50.0	49.5
Income (loss) from discontinued operations, net of tax	1.3	(1.5)	175.2
Net income	$ 65.4	$ 48.5	$ 224.7
Net income per common share from continuing operations:
Net income per share from continuing operations-basic (in dollars per share)	$ 1.69	$ 1.33	$ 1.34
Net income per share from continuing operations-diluted (in dollars per share)	1.68	1.32	1.31
Net income (loss) per common share from discontinued operations:
Net income (loss) per common share from discontinued operations- basic (in dollars per share)	0.03	(0.04)	4.69
Net income (loss) per common share from discontinued operations-diluted (in dollars per share)	0.03	(0.04)	4.62
Net Income (Loss) Per Common Share
Net income (loss) per common share - basic (in dollars per share)	1.72	1.29	6.03
Net income (loss) per common share - diluted (in dollars per share)	$ 1.71	$ 1.28	$ 5.93
Weighted average common and common equivalent shares:
Weighted average shares outstanding for basic net income per share (shares)	37.5	37.5	37.2
Weighted average shares outstanding for diluted net income per share (shares)	37.7	37.7	37.9
Dividends declared (in dollars per share)	$ 3.56	$ 0.48	$ 7.94