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Other Information (Schedule Of Accumulated Other Comprehensive Loss) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Other Information [Abstract]      
Cumulative currency translation adjustment $ (178,372) $ (212,761)  
Cumulative unrealized gain (losses) on security 66,982 41,302  
Cumulative other adjustments 6,286 5,708  
Cumulative unrealized gain (losses) on cash flow derivatives (48,180) (100,292) (134,067)
Total accumulated other comprehensive loss $ (153,284) $ (266,043)