Business Segment Information (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) segment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment									3
Total assets	$ 1,696.3				$ 1,769.8				$ 1,696.3	$ 1,769.8
Total long-lived assets	221.8				216.9				221.8	216.9
Total net sales to external customers	306.3	$ 292.7	$ 301.3	$ 279.2	320.5	$ 314.6	$ 295.9	$ 280.3	1,179.5	1,211.3	$ 1,028.8
Total operating earnings	33.8	$ 11.0	$ 19.6	$ 7.4	24.2	$ 20.8	$ 24.8	$ 15.3	71.8	85.1	54.3
Total capital expenditures									52.7	41.4	30.0
Total depreciation and amortization									62.7	71.6	73.2
Corporate [Member]
Segment Reporting Information [Line Items]
Total assets	24.2				46.6				24.2	46.6
Total long-lived assets	6.1				3.9				6.1	3.9
Total operating earnings									(48.5)	(37.5)	(21.0)
Total capital expenditures									2.6	0.9	0.8
Total depreciation and amortization									0.4	0.2	0.3
Advanced Plastic Processing Technologies [Member] | Segments [Member]
Segment Reporting Information [Line Items]
Total assets	501.1				460.9				501.1	460.9
Total long-lived assets	110.0				98.3				110.0	98.3
Total net sales to external customers									674.0	675.8	580.1
Total operating earnings									56.5	51.9	34.1
Total capital expenditures									29.4	22.9	15.4
Total depreciation and amortization									19.9	22.6	25.4
Melt Delivery and Control Systems [Member] | Segments [Member]
Segment Reporting Information [Line Items]
Total assets	1,029.3				1,112.1				1,029.3	1,112.1
Total long-lived assets	90.3				97.6				90.3	97.6
Total net sales to external customers									390.3	406.7	320.5
Total operating earnings									50.9	57.2	28.8
Total capital expenditures									19.5	15.8	11.7
Total depreciation and amortization									35.7	39.9	36.4
Fluid Technologies [Member] | Segments [Member]
Segment Reporting Information [Line Items]
Total assets	141.7				150.2				141.7	150.2
Total long-lived assets	$ 15.4				$ 17.1				15.4	17.1
Total net sales to external customers									115.2	128.8	128.2
Total operating earnings									12.9	13.5	12.4
Total capital expenditures									1.2	1.8	2.1
Total depreciation and amortization									$ 6.7	$ 8.9	$ 11.1