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Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales	$ 308.8	$ 269.4	$ 906.9	$ 810.1
Cost of sales	226.8	200.4	665.6	600.0
Gross profit	82.0	69.0	241.3	210.1
Selling, engineering, general and administrative expenses	43.0	38.2	128.7	120.7
Acquisition and integration-related expenses	0.4	0.4	1.9	1.3
Operating income	38.6	30.4	110.7	88.1
Interest expense	2.1	2.2	6.1	7.2
Other expense, net	0.2	0.0	0.5	0.5
Income before income taxes	36.3	28.2	104.1	80.4
Income tax expense	7.9	6.5	25.4	18.9
Net income	$ 28.4	$ 21.7	$ 78.7	$ 61.5
Basic earnings per share:
Earnings per share (usd per share)	$ 0.47	$ 0.36	$ 1.31	$ 1.03
Diluted earnings per share:
Net earnings per share (usd per share)	$ 0.46	$ 0.36	$ 1.28	$ 1.01
Weighted average common shares outstanding:
Basic (shares)	60.2	60.0	60.1	59.9
Diluted (shares)	61.4	61.1	61.3	61.0

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