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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | The following table represents the changes in goodwill:
| December 31,
| 2014 |  | 2013
Beginning balance | $ | 398,905 |  |  | $ | 398,941 |
Foreign currency translation adjustments and other | (2,676 | ) |  | (344 | )
Goodwill acquired during the year | 9,293 |  |  | 308 |
Ending balance | $ | 405,522 |  |  | $ | 398,905 |
The following table represents the changes in goodwill by segment:
| Energy & Chemicals |  | Distribution & Storage |  | BioMedical |  | Total
Balance at January 1, 2013 | $ | 83,215 |  |  | $ | 158,789 |  |  | $ | 156,937 |  |  | $ | 398,941 |
Foreign currency translation adjustments and other | — |  |  | 957 |  |  | (1,301 | ) |  | (344 | )
Goodwill acquired during the year | — |  |  | 308 |  |  | — |  |  | 308 |
Balance at December 31, 2013 | 83,215 |  |  | 160,054 |  |  | 155,636 |  |  | 398,905 |
Foreign currency translation adjustments and other | 130 |  |  | (2,806 | ) |  | — |  |  | (2,676 | )
Goodwill acquired during the year | 9,293 |  |  | — |  |  | — |  |  | 9,293 |
Balance at December 31, 2014 | $ | 92,638 |  |  | $ | 157,248 |  |  | $ | 155,636 |  |  | $ | 405,522 |
Schedule Of Finite Lived And Indefinite Lived Intangible Assets [Table Text Block] | The following table displays the gross carrying amount and accumulated amortization for finite-lived intangible assets and indefinite-lived intangible assets (exclusive of goodwill)(1):
| December 31, 2014 |  | December 31, 2013
| Gross Carrying Amount |  | Accumulated Amortization |  | Gross Carrying Amount |  | Accumulated Amortization
Finite-lived intangible assets: |  |  |  |  |  |  |
Unpatented technology | $ | 35,933 |  |  | $ | (6,979 | ) |  | $ | 43,133 |  |  | $ | (11,776 | )
Patents | 7,809 |  |  | (6,213 | ) |  | 7,904 |  |  | (5,397 | )
Trademarks and trade names | 8,981 |  |  | (6,206 | ) |  | 9,244 |  |  | (4,525 | )
Non-compete agreements | 421 |  |  | (88 | ) |  | — |  |  | — |
Customer relations | 157,533 |  |  | (85,187 | ) |  | 159,143 |  |  | (73,460 | )
Total finite-lived intangible assets | $ | 210,677 |  |  | $ | (104,673 | ) |  | $ | 219,424 |  |  | $ | (95,158 | )
Indefinite-lived intangible assets: |  |  |  |  |  |  |
Trademarks and trade names | $ | 47,662 |  |  |  |  | $ | 47,876 |  |  |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] | The Company estimates amortization expense to be recognized during the next five years as follows:
For the Year Ending December 31, |
2015 | $ | 16,200 |
2016 | 14,300 |
2017 | 13,400 |
2018 | 12,700 |
2019 | 12,500 |
The Company recorded an impairment loss of $3,070 during 2012 resulting in the elimination of in-process research & development (“IPR&D”) indefinite-lived intangible assets related to a prior BioMedical segment acquisition. Higher forecasted costs and project delays represented impairment indicators requiring the Company to re-evaluate the fair value of the IPR&D indefinite-lived intangible assets. The Company conducted an impairment test based on the multi-period excess earnings valuation method which determines fair value based on the present value of the prospective net cash flow attributable to the intangible asset (Level 3 in the fair value hierarchy). The Company determined that the fair value of the IPR&D indefinite-lived intangible assets was zero and impaired the intangible assets by a value equal to their carrying amount.

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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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