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Goodwill and Other Intangible Assets (Schedule of Goodwill by Reportable Segments) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Goodwill [Line Items] |  |  |  |
Goodwill | $ 191,616 | $ 191,616 | $ 199,290 | $ 45,970
Acquisitions |  |  | 153,320 |
Purchase accounting adjustments | 0 | (7,674) |  |
Americas [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 153,514 | 153,514 | 161,188 | 7,868
Acquisitions |  |  | 153,320 |
Purchase accounting adjustments | 0 | (7,674) |  |
Asia [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 38,102 | 38,102 | 38,102 | $ 38,102
Acquisitions |  |  | $ 0 |
Purchase accounting adjustments | $ 0 | $ 0 |  |

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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 -Subparagraph (a) -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + 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 (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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