Segment Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	2
Restructuring and related charges		$ 0.6
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	$ 491.5	443.5
Total operating (loss) profit	88.0	70.7
Interest expense	2.0	2.3
Interest income	(0.8)	(0.9)
Other nonoperating expense (income)	0.3	(0.6)
Income before income taxes	86.5	69.9
Proprietary Products [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	373.5	340.4
Total operating (loss) profit	93.2	77.0
Contract-Manufactured Products [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	118.1	103.1
Total operating (loss) profit	12.8	10.5
Intersegment sales elimination [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net sales	(0.1)	0.0
Corporate [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating (loss) profit	(18.0)	(16.2)
Other unallocated items [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total operating (loss) profit	$ 0.0	$ (0.6)