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Goodwill And Other Intangible Assets (Schedule Of Changes In The Carrying Value Of Goodwill) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Balance as of December 31, 2014 $ 420,129
Impairment (35,381)
Currency translation effect (316)
Balance as of March 31, 2015 $ 384,432