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Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 269.4	$ 248.7	$ 810.1	$ 650.9
Cost of sales	200.4	187.4	600.0	491.3
Gross profit	69.0	61.3	210.1	159.6
Selling, engineering, general and administrative expenses	38.2	38.2	120.7	104.4
Acquisition and integration-related expenses	0.4	0.7	1.3	2.2
Restructuring	0.0	0.1	0.0	0.5
Operating income	30.4	22.3	88.1	52.5
Interest expense	2.2	2.7	7.2	4.6
Other (income) expense, net	0.0	(0.4)	0.5	(0.7)
Income before income taxes	28.2	20.0	80.4	48.6
Income tax expense	6.5	7.5	18.9	17.4
Net income	$ 21.7	$ 12.5	$ 61.5	$ 31.2
Basic earnings per share:
Net earnings per share (usd per share)	$ 0.36	$ 0.21	$ 1.03	$ 0.52
Diluted earnings per share:
Net earnings per share (usd per share)	$ 0.36	$ 0.21	$ 1.01	$ 0.52
Weighted average common shares outstanding:
Basic (shares)	60.0	59.8	59.9	59.7
Diluted (shares)	61.1	60.6	61.0	60.4
Cash dividends declared per common share (usd per share)	$ 0.08	$ 0.07	$ 0.23	$ 0.21

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration