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Segment Information (Schedule of Capital Expenditures By Geographic Area) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]      
Capital expenditures $ 40,694 $ 30,881 $ 16,567
Americas      
Segment Reporting Information [Line Items]      
Capital expenditures 19,668 23,925 8,172
EMEA      
Segment Reporting Information [Line Items]      
Capital expenditures 20,057 5,227 5,947
Asia Pacific      
Segment Reporting Information [Line Items]      
Capital expenditures $ 969 $ 1,729 $ 2,448