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Segment Information (Schedule Of Revenue From Unaffiliated Customers By Geographic Area) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2016 USD ($) segment | Jun. 30, 2015 USD ($)
Number of reportable business segments | segment |  |  | 1 |
Revenue from unaffiliated customers | $ 158,111 | $ 170,504 | $ 310,666 | $ 331,226
Operating Segments [Member] | Americas [Member] |  |  |  |
Revenue from unaffiliated customers | 83,601 | 90,396 | 167,091 | 176,658
Operating Segments [Member] | Germany [Member] |  |  |  |
Revenue from unaffiliated customers | 20,547 | 21,345 | 39,429 | 42,595
Operating Segments [Member] | Other EMEA [Member] |  |  |  |
Revenue from unaffiliated customers | 28,207 | 30,958 | 56,756 | 58,412
Operating Segments [Member] | Asia Pacific [Member] |  |  |  |
Revenue from unaffiliated customers | $ 25,756 | $ 27,805 | $ 47,390 | $ 53,561

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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