Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Net sales	$ 839.9	$ 764.1	$ 794.3
Cost of products sold	583.2	539.7	575.5
Gross profit	256.7	224.4	218.8
Selling expense	25.3	22.2	22.0
Research expense	17.5	14.0	15.7
General expense	82.2	70.6	61.9
Total nonmanufacturing expenses	125.0	106.8	99.6
Restructuring and impairment expense	25.6	14.6	13.1
Operating profit	106.1	103.0	106.1
Interest expense	16.6	9.7	7.2
Other income, net	3.9	12.2	9.3
Income from continuing operations before income taxes and income from equity affiliates	93.4	105.5	108.2
Provision for income taxes	15.4	21.6	20.5
Income from equity affiliates, net of income taxes	4.8	6.6	2.0
Income from continuing operations	82.8	90.5	89.7
Loss from discontinued operations	0.0	(0.8)	0.0
Net income	$ 82.8	$ 89.7	$ 89.7
Net income (loss) per share - basic:
Income per share from continuing operations (in dollars per share)	$ 2.71	$ 2.97	$ 2.94
Loss per share from discontinued operations (in dollars per share)	0.00	(0.02)	0.00
Net income per share - basic (in dollars per share)	2.71	2.95	2.94
Net income (loss) per share – diluted:
Income per share from continuing operations (in dollars per share)	2.70	2.96	2.93
Loss per share from discontinued operations (in dollars per share)	0.00	(0.02)	0.00
Net income per share - diluted (in dollars per share)	$ 2.70	$ 2.94	$ 2.93
Weighted average shares outstanding:
Basic (in shares)	30,310,900	30,251,400	30,238,000
Diluted (in shares)	30,463,400	30,374,300	30,356,500