CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 979.9	$ 941.5	$ 887.7
Cost of products sold	781.2	727.0	692.3
Gross profit	198.7	214.5	195.4
Selling, general and administrative expenses	96.5	92.2	86.5
Acquisition/integration/restructuring costs	1.3	7.0	6.5
Insurance settlement	(3.2)	0.0	0.0
Pension and SERP plan settlement charges	0.6	0.8	0.0
Other (income) expense — net	(0.8)	0.4	1.0
Operating income	104.3	114.1	101.4
Interest expense	12.7	11.2	11.7
Interest income	(0.1)	(0.1)	(0.2)
Income from continuing operations before income taxes	91.7	103.0	89.9
Provision for income taxes	11.4	29.6	29.4
Income from continuing operations	80.3	73.4	60.5
Loss from discontinued operations, net of taxes (Note 13)	0.0	(0.4)	(9.4)
Net income	$ 80.3	$ 73.0	$ 51.1
Basic
Continuing operations (in dollars per share)	$ 4.74	$ 4.33	$ 3.58
Discontinued operations (in dollars per share)	0.00	(0.02)	(0.56)
Basic (in dollars per share)	4.74	4.31	3.02
Diluted
Continuing operations (in dollars per share)	4.68	4.26	3.53
Discontinued operations (in dollars per share)	0.00	(0.02)	(0.55)
Diluted (in dollars per share)	$ 4.68	$ 4.24	$ 2.98
Weighted Average Common Shares Outstanding (in thousands)
Basic (in shares)	16,805	16,773	16,754
Diluted (in shares)	17,052	17,087	17,012