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Goodwill and Other Intangibles - Changes in Goodwill (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2017
Goodwill [Line Items] |  |
Goodwill classified as assets held for sale |  | $ 14,400
Goodwill [Roll Forward] |  |
Balance at beginning of period | $ 1,610,355 |
Foreign currency translation adjustments and other | (19,449) |
Balance at end of period | 1,590,906 |
Reportable Segments | Lithium |  |
Goodwill [Roll Forward] |  |
Balance at beginning of period | 1,389,089 |
Foreign currency translation adjustments and other | (15,766) |
Balance at end of period | 1,373,323 |
Reportable Segments | Bromine Specialties |  |
Goodwill [Roll Forward] |  |
Balance at beginning of period | 20,319 |
Foreign currency translation adjustments and other | 0 |
Balance at end of period | 20,319 |
Reportable Segments | Catalysts |  |
Goodwill [Roll Forward] |  |
Balance at beginning of period | 194,361 |
Foreign currency translation adjustments and other | (3,683) |
Balance at end of period | 190,678 |
Reportable Segments | All Other |  |
Goodwill [Roll Forward] |  |
Balance at beginning of period | 6,586 |
Foreign currency translation adjustments and other | 0 |
Balance at end of period | $ 6,586 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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