Business Segment Information - Business Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total assets	$ 1,727.1		$ 1,696.3
Total long-lived assets	217.8		221.8
Total net sales to external customers	277.3	$ 279.2
Total operating earnings	32.0	7.4
Total capital expenditures	8.0	14.6
Total depreciation and amortization	14.8	16.2
Corporate [Member]
Segment Reporting Information [Line Items]
Total assets	38.1		24.2
Total long-lived assets	6.5		6.1
Total operating earnings	(10.1)	(8.6)
Total capital expenditures	0.6	0.3
Total depreciation and amortization	0.1	0.1
Advanced Plastic Processing Technologies [Member] | Segments [Member]
Segment Reporting Information [Line Items]
Total assets	500.9		501.1
Total long-lived assets	105.5		110.0
Total net sales to external customers	156.1	154.0
Total operating earnings	9.8	10.3
Total capital expenditures	5.6	9.6
Total depreciation and amortization	5.1	5.3
Melt Delivery and Control Systems [Member] | Segments [Member]
Segment Reporting Information [Line Items]
Total assets	1,043.8		1,029.3
Total long-lived assets	90.4		90.3
Total net sales to external customers	93.0	96.8
Total operating earnings	28.2	2.9
Total capital expenditures	1.7	4.5
Total depreciation and amortization	8.2	9.1
Fluid Technologies [Member] | Segments [Member]
Segment Reporting Information [Line Items]
Total assets	144.3		141.7
Total long-lived assets	15.4		$ 15.4
Total net sales to external customers	28.2	28.4
Total operating earnings	4.1	2.8
Total capital expenditures	0.1	0.2
Total depreciation and amortization	$ 1.4	$ 1.7