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Goodwill and Intangible Assets Goodwill (Details) - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2015 | Dec. 31, 2014
Goodwill [Line Items] |  |
Share Price | $ 19.21 | $ 34.20
Goodwill [Roll Forward] |  |
Beginning Balance, Goodwill | $ 405,522 |
Goodwill, Translation and Purchase Accounting Adjustments | (2,002) |
Goodwill, Acquired During Period | 10,601 |
Ending Balance, Goodwill | 414,121 |
Energy & Chemicals [Member] |  |
Goodwill [Roll Forward] |  |
Beginning Balance, Goodwill | 92,638 |
Goodwill, Translation and Purchase Accounting Adjustments | (359) |
Goodwill, Acquired During Period | 0 |
Ending Balance, Goodwill | 92,279 |
Distribution & Storage [Member] |  |
Goodwill [Roll Forward] |  |
Beginning Balance, Goodwill | 157,248 |
Goodwill, Translation and Purchase Accounting Adjustments | (1,643) |
Goodwill, Acquired During Period | 10,601 |
Ending Balance, Goodwill | 166,206 |
BioMedical [Member] |  |
Goodwill [Roll Forward] |  |
Beginning Balance, Goodwill | 155,636 |
Goodwill, Translation and Purchase Accounting Adjustments | 0 |
Goodwill, Acquired During Period | 0 |
Ending Balance, Goodwill | $ 155,636 |
Minimum [Member] |  |
Goodwill [Line Items] |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 10.00% |
Maximum [Member] |  |
Goodwill [Line Items] |  |
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount | 20.00% |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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