Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 267.0	$ 231.4	$ 829.4	$ 785.5
Cost of sales	204.7	181.2	631.6	602.3
Gross profit	62.3	50.2	197.8	183.2
Selling, general and administrative expenses	48.6	43.2	148.3	130.2
Research and development expenses	6.7	5.7	20.0	17.6
Restructuring, impairment and other asset charges, net	0.3	2.2	1.8	10.3
Income (loss) from operations	6.7	(0.9)	27.7	25.1
Other income:
Interest expense	(0.2)	0.0	(0.6)	(0.2)
Interest income	0.1	0.2	0.4	0.6
Other	(0.1)	1.1	(0.1)	1.4
Income from operations before income taxes	6.5	0.4	27.4	26.9
Income tax (benefit) provision	(2.8)	(1.2)	0.4	(4.5)
Net income	9.3	1.6	27.0	31.4
Net loss attributable to noncontrolling interest	0.0	0.0	0.0	0.1
Net income attributable to controlling interest	$ 9.3	$ 1.6	$ 27.0	$ 31.5
Per share data:
Earnings per common share - Basic (in dollars per share)	$ 0.41	$ 0.07	$ 1.19	$ 1.39
Earnings per common share - Diluted (in dollars per share)	$ 0.41	$ 0.07	$ 1.18	$ 1.38
Weighted average shares outstanding - Basic	22,761,203	22,615,492	22,712,894	22,592,779
Weighted average shares outstanding - Diluted	22,913,563	22,945,893	22,922,930	22,837,725