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Comprehensive Income (Loss) (Accumulated Other Comprehensive Income (Loss), Net Of Taxes) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Comprehensive Income (Loss) [Abstract]    
Net unrealized gain (loss) on available-for-sale securities $ (26,748) $ 16,528
Net unrealized gain on cash flow hedges 97,444 21,615
Cumulative foreign currency translation adjustment (12,496) (7,232)
Accumulated other comprehensive income $ 58,200 $ 30,911