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Acquisitions TBEI Pro Forma (Details) - TBEI [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		4 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Net sales	$ 248.7	$ 239.1		$ 740.0	$ 695.4
Income from continuing operations	$ 13.1	$ 9.8		$ 38.3	$ 36.2
Diluted earnings from continuing operations (per share)	$ 0.22	$ 0.16		$ 0.63	$ 0.59
Environmental Solutions
Business Acquisition [Line Items]
Business combination, pro forma information, revenue of acquiree since acquisition date, actual			$ 65.3
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual			$ 3.9

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Per diluted share amount of pro forma income from continuing operations, after tax, 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=65885119&loc=d3e1392-128463

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

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-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
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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.

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-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.

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-Name Accounting Standards Codification
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