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Acquisitions TBEI Pro Forma (Details) - TBEI [Member] - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended
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Jun. 30, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Business Acquisition [Line Items] |  |  |  |  |
Net sales |  | $ 261.8 | $ 232.1 | $ 491.3 | $ 456.3
Income from continuing operations |  | $ 14.8 | $ 13.0 | $ 25.2 | $ 26.4
Diluted earnings from continuing operations (per share) |  | $ 0.25 | $ 0.21 | $ 0.42 | $ 0.43
Environmental Solutions |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business combination, pro forma information, revenue of acquiree since acquisition date, actual | $ 18.1 |  |  |  |
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual | $ 0.8 |  |  |  |

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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=65885119&loc=d3e1392-128463 + Details
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