Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 285.7	$ 243.9	$ 755.1	$ 724.7
Cost of sales	183.4	159.5	491.3	474.0
Gross profit	102.3	84.4	263.8	250.7
Selling, distribution & administrative expenses	70.9	66.7	200.8	199.8
Special charges	0.0	(0.8)	0.0	(0.8)
Operating income from continuing operations	31.4	18.5	63.0	51.7
Interest and other (income) expense, net	(0.1)	0.1	0.1	(0.0)
Income from continuing operations before income taxes	31.5	18.4	62.9	51.7
Provision for income taxes	7.4	4.7	15.2	13.1
Net income from continuing operations	24.1	13.7	47.7	38.6
Net income (loss) from discontinued operations	0.5	(1.0)	1.5	(1.6)
Net income	$ 24.6	$ 12.7	$ 49.2	$ 37.0
Net income per common share from continuing operations:
Basic (in dollars per share)	$ 0.64	$ 0.36	$ 1.26	$ 1.03
Diluted (in dollars per share)	0.64	0.36	1.26	1.02
Net income (loss) per common share from discontinued operations:
Basic (in dollars per share)	0.01	(0.03)	0.04	(0.04)
Diluted (in dollars per share)	0.01	(0.03)	0.04	(0.04)
Net income per common share:
Net income per share - Basic (in dollars per share)	0.65	0.33	1.30	0.99
Net income per share - Diluted (in dollars per share)	$ 0.65	$ 0.33	$ 1.30	$ 0.98
Weighted average common and common equivalent shares:
Basic (in shares)	37.5	37.5	37.6	37.4
Diluted (in shares)	37.6	38.0	37.7	37.9
Dividends declared (in dollars per share)	$ 0.14	$ 0.12	$ 1.42	$ 0.36