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Business Acquisitions - Actual and Pro Forma Net Sales and Income from Continuing Operations (Details) - Conwed Plastics LLC [Member] - USD ($) $ in Millions	2 Months Ended	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2018
Business Acquisition [Line Items]
Actual Net Sales	$ 26.6
Actual Income from Continuing Operations	$ (0.1)
Pro Forma Net Sales		$ 241.0
Pro Forma Income from Continuing Operations		$ 10.4

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- Definition

Amount after tax of pro forma income from continuing operations as if the business combination had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
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This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
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+ References

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-Section 50
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