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Segment Information (Schedule Of Capital Expenditures By Geographic Area) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 30,881 | $ 16,567 | $ 22,399
Americas [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 23,925 | 8,172 | 14,062
EMEA [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 5,227 | 5,947 | 7,469
Asia Pacific [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 1,729 | $ 2,448 | $ 868

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- Definition The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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