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Intangible Assets, Net (Schedule Of Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Cost Of Revenues [Member]
Dec. 31, 2012
Selling And Marketing [Member]
Dec. 31, 2012
Technology [Member]
Dec. 31, 2011
Technology [Member]
Dec. 31, 2012
Trade Names [Member]
Dec. 31, 2011
Trade Names [Member]
Dec. 31, 2012
Customer Relationships [Member]
Dec. 31, 2011
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]                    
Original amount $ 17,507 $ 17,600     $ 8,600 $ 8,600 $ 800 $ 800 $ 8,107 $ 8,200
Accumulated amortization 7,698 4,161     2,397 1,165 780 379 4,521 2,617
Intangible assets, net 9,809 13,439                
Amortization expense     $ 4,161 $ 3,537