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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

X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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