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Segment Information (Schedule of Revenue By Products) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Revenue from External Customer [Line Items]        
Licenses Revenue $ 517,222 $ 464,806 $ 999,149 $ 883,805
Services revenue 605,804 456,404 1,179,059 881,126
Revenues $ 1,123,026 $ 921,210 $ 2,178,208 $ 1,764,931