Goodwill And Other Intangible Assets (Schedule Of Changes In The Carrying Value Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Balance as of December 31, 2014	$ 420,129us-gaap_Goodwill
Impairment	(35,381)us-gaap_GoodwillImpairmentLoss
Currency translation effect	(312)us-gaap_GoodwillTranslationAdjustments
Balance as of March 31, 2015	$ 384,436us-gaap_Goodwill

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Paragraph 28

-Subparagraph (b)

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Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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