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Segment Information (Schedule Of Capital Expenditures By Geographic Area) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]      
Capital expenditures $ 22,399 $ 22,727 $ 6,972
Americas [Member]      
Segment Reporting Information [Line Items]      
Capital expenditures 14,062 18,187 5,166
Germany [Member]      
Segment Reporting Information [Line Items]      
Capital expenditures 613 235 21
Other EMEA [Member]      
Segment Reporting Information [Line Items]      
Capital expenditures 6,856 3,680 1,171
Asia Pacific [Member]      
Segment Reporting Information [Line Items]      
Capital expenditures $ 868 $ 625 $ 614