Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 339.6	$ 372.3
Cost of goods sold	(238.8)	(258.4)
Gross profit	100.8	113.9
Operating expenses:
Selling, general and administrative	(63.6)	(64.4)
Research and development	(9.0)	(8.6)
Total operating expenses	(72.6)	(73.0)
Operating income	28.2	40.9
Other income, net	3.0	3.9
Interest expense, net	(0.4)	(0.6)
Income before income tax expense	30.8	44.2
Income tax expense	(7.4)	(11.1)
Net income	$ 23.4	$ 33.1
Earnings per share:
Basic	$ 0.95	$ 1.35
Diluted	$ 0.94	$ 1.34
Weighted average shares outstanding (in thousands):
Basic	24,601	24,529
Diluted	24,840	24,742