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Segment Information (Schedule Of Revenue From Unaffiliated Customers By Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Revenue from unaffiliated customers	$ 151,574	$ 166,944	$ 482,800	$ 466,214
Americas [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated customers	80,724	90,992	257,382	237,919
Germany [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated customers	18,972	19,843	61,567	63,230
Other EMEA [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated customers	26,063	27,364	84,475	73,556
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenue from unaffiliated customers	$ 25,815	$ 28,745	$ 79,376	$ 91,509

X

- 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



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 1



-Article 5

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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