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Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Changes in the carrying value of goodwill | Changes in the carrying value of goodwill for each reporting unit are as follows (in thousands):
| Energy Chemistry Technologies |  | Consumer and Industrial Chemistry Technologies |  | Teledrift® |  | Production Technologies |  | Total
Balance at December 31, 2014 | $ | 36,318 |  |  | $ | 19,480 |  |  | $ | 15,333 |  |  | $ | — |  |  | $ | 71,131 |
Addition upon acquisition of IAL | — |  |  | — |  |  | — |  |  | 1,689 |  |  | 1,689 |
Balance at September 30, 2015 | $ | 36,318 |  |  | $ | 19,480 |  |  | $ | 15,333 |  |  | $ | 1,689 |  |  | $ | 72,820 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + 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 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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