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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 | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | $ 4,362 | $ 16,796 | $ 13,879 | $ 34,315
Subtotal [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | 4,994 | 17,036 | 14,629 | 35,049
Inter-Segment Elimination [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | (632) | (240) | (750) | (734)
United States [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | (7,036) | 11,643 | (9,066) | 22,912
Germany [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | 451 | (318) | 648 | 343
Other Europe [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | 2,124 | 235 | 4,525 | 2,001
Asia Pacific [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Income (loss) from operations | $ 9,455 | $ 5,476 | $ 18,522 | $ 9,793

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- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
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Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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