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Taxes On Income (Schedule Of Income (Loss) Before Taxes) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Taxes On Income [Abstract]      
Domestic $ (46,207) $ (35,797) $ 12,369
Foreign 24,017 (15,598) 2,871
Income (loss) before taxes $ (22,190) $ (51,395) $ 15,240