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Segment Information (Schedule Of Intercompany Sales By Geographic Area) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]      
Intercompany Sales $ 85,124 $ 19,748 $ 49,263
United States [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 44,160 12,020 31,831
Germany [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 5,960 2,402 3,895
Other Europe [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 31,206 5,131 13,515
Asia Pacific [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 3,798 195 22
Intercompany Sales To United States [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 30,346 5,204 13,778
Intercompany Sales To United States [Member] | Germany [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 1,825 197 372
Intercompany Sales To United States [Member] | Other Europe [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 26,862 4,812 13,388
Intercompany Sales To United States [Member] | Asia Pacific [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 1,659 195 18
Intercompany Sales To Germany [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 25,429 6,849 17,647
Intercompany Sales To Germany [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 23,100 6,823 17,634
Intercompany Sales To Germany [Member] | Other Europe [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 1,688 26 9
Intercompany Sales To Germany [Member] | Asia Pacific [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 641   4
Intercompany Sales To Other Europe [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 21,914 6,613 13,854
Intercompany Sales To Other Europe [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 15,622 4,153 10,213
Intercompany Sales To Other Europe [Member] | Germany [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 4,135 2,205 3,523
Intercompany Sales To Other Europe [Member] | Other Europe [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 2,090 255 118
Intercompany Sales To Other Europe [Member] | Asia Pacific [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 67    
Intercompany Sales To Asia Pacific [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 7,435 1,082 3,984
Intercompany Sales To Asia Pacific [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 5,438 1,044 3,984
Intercompany Sales To Asia Pacific [Member] | Other Europe [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales 566 38  
Intercompany Sales To Asia Pacific [Member] | Asia Pacific [Member]
      
Segment Reporting Information [Line Items]      
Intercompany Sales $ 1,431