CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net sales	$ 253.4	$ 271.3	$ 493.1	$ 537.8
Cost of products sold	202.7	216.2	398.7	430.3
Gross profit	50.7	55.1	94.4	107.5
Selling, general and administrative expenses	26.9	25.2	52.2	52.0
Impairment loss (Note 12)	0.0	32.0	0.0	32.0
Restructuring and other non-routine costs (Note 13)	3.5	0.3	3.5	0.3
Pension settlement and other benefit costs (Note 7)	0.0	1.0	0.0	1.8
Other expense - net	0.5	0.9	1.5	1.6
Operating income (loss)	19.8	(4.3)	37.2	19.8
Interest expense - net	3.0	3.3	6.2	6.6
Income (loss) from continuing operations before income taxes	16.8	(7.6)	31.0	13.2
Provision (benefit) for income taxes	3.2	(2.8)	5.6	1.8
Net income (loss)	$ 13.6	$ (4.8)	$ 25.4	$ 11.4
Earnings (Loss) Per Common Share
Basic (in dollars per share)	$ 0.80	$ (0.29)	$ 1.50	$ 0.67
Diluted (in dollars per share)	$ 0.80	$ (0.29)	$ 1.49	$ 0.66
Weighted Average Common Shares Outstanding (in thousands)
Basic (in shares)	16,863	16,827	16,861	16,842
Diluted (in shares)	16,910	16,827	16,914	16,989
Cash dividends declared per share of common stock (in usd per share)	$ 0.45	$ 0.41	$ 0.90	$ 0.82