Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales	$ 448.0	$ 450.1	$ 1,370.7	$ 1,331.5
Cost of sales	359.6	370.1	1,106.9	1,092.6
Gross profit	88.4	80.0	263.8	238.9
Operating costs and expenses:
Engineering, selling and administrative expenses	54.8	62.1	164.7	184.6
Asset impairment expense				0.4
Amortization of intangible assets	0.0	0.0	0.2	0.2
Restructuring expense	1.1	1.0	8.3	11.0
Total operating costs and expenses	55.9	63.1	173.2	196.2
Operating income	32.5	16.9	90.6	42.7
Other income (expense):
Interest expense	(7.2)	(9.9)	(25.6)	(29.3)
Amortization of deferred financing fees	(0.4)	(0.5)	(1.2)	(1.4)
Loss on debt extinguishment			(25.0)
Other income (expense) - net	(3.7)	(5.7)	8.8	(8.6)
Total other expense	(11.3)	(16.1)	(43.0)	(39.3)
Income from continuing operations before income taxes	21.2	0.8	47.6	3.4
Provision (benefit) for income taxes	3.1	(10.7)	10.3	(8.0)
Income from continuing operations	18.1	11.5	37.3	11.4
Discontinued operations:
Loss from discontinued operations, net of income taxes of $0.0, $0.0, $0.0 and $0.0, respectively				(0.2)
Net income	$ 18.1	$ 11.5	$ 37.3	$ 11.2
Basic income (loss) per common share:
Income from continuing operations	$ 0.51	$ 0.32	$ 1.05	$ 0.33
Loss from discontinued operations, net of income taxes				(0.01)
Basic income per common share	0.51	0.32	1.05	0.32
Diluted income (loss) per common share:
Income from continuing operations	0.51	0.32	1.05	0.32
Loss from discontinued operations, net of income taxes				(0.01)
Diluted income per common share	$ 0.51	$ 0.32	$ 1.05	$ 0.31
Weighted average shares outstanding - basic	35,348,597	35,564,946	35,527,971	35,488,271
Weighted average shares outstanding - diluted	35,458,956	35,928,327	35,686,831	35,935,093