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Business Segment Information (Total Net Revenues By Geographic Region) (Details) (USD $)
In Thousands
3 Months Ended 6 Months Ended
Jun. 26, 2011
Jun. 27, 2010
Jun. 26, 2011
Jun. 27, 2010
Total net revenues $ 391,286 $ 358,427 $ 745,290 $ 701,964
United States [Member]
       
Total net revenues 203,898 197,780 392,220 381,459
Europe, Middle East And Africa [Member]
       
Total net revenues 143,564 123,436 273,936 251,913
Asia, Latin America, Canada And Mexico [Member]
       
Total net revenues $ 43,824 $ 37,211 $ 79,134 $ 68,592