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Fair Value Measurements And Marketable Securities (Schedule Of Fair Value Of Available-For-Sale Securities By Major Security) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]  
Bank certificates of deposit $ 2,639
Fair Value Inputs Level2 [Member]
 
Schedule of Available-for-sale Securities [Line Items]  
Bank certificates of deposit $ 2,639