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Goodwill And Other Intangible Assets, Net (Other Intangible Assets, Net) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]    
Original amount $ 238,821 $ 235,422
Accumulated amortization 212,582 168,657
Other intangible assets, net 26,239 66,765
Useful life, minimum 0.5  
Useful life, maximum 20  
Core Technology [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Original amount 43,748 141,819
Accumulated amortization 137,736 106,565
Other intangible assets, net 6,012 35,254
Useful life, minimum 2  
Useful life, maximum 8  
Trademarks And Trade Names [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Original amount 26,476 26,476
Accumulated amortization 9,070 7,175
Other intangible assets, net 17,406 19,301
Useful life, minimum 3  
Useful life, maximum 20  
Customer Relationship [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Original amount 68,597 67,127
Accumulated amortization 65,776 54,917
Other intangible assets, net $ 2,821 $ 12,210
Useful life, minimum 2  
Useful life, maximum 6