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Segment Information (Schedule Of Income Or Loss From Operations By Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Segment Reporting Information [Line Items] |  |
Income (loss) from operations | $ 9,517 | $ 17,519
Subtotal [Member] |  |
Segment Reporting Information [Line Items] |  |
Income (loss) from operations | 9,635 | 18,013
Inter-Segment Elimination [Member] |  |
Segment Reporting Information [Line Items] |  |
Income (loss) from operations | (118) | (494)
United States [Member] |  |
Segment Reporting Information [Line Items] |  |
Income (loss) from operations | (2,030) | 11,269
Germany [Member] |  |
Segment Reporting Information [Line Items] |  |
Income (loss) from operations | 197 | 661
Other Europe [Member] |  |
Segment Reporting Information [Line Items] |  |
Income (loss) from operations | 2,401 | 1,766
Asia Pacific [Member] |  |
Segment Reporting Information [Line Items] |  |
Income (loss) from operations | $ 9,067 | $ 4,317

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- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration