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Goodwill and Intangible Assets - Schedule Of Finite-Lived Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended
Apr. 27, 2014
Jan. 26, 2014
Apr. 27, 2014
Developed Technology [Member]
Jan. 26, 2014
Developed Technology [Member]
Apr. 27, 2014
Developed Technology [Member]
Minimum [Member]
Apr. 27, 2014
Developed Technology [Member]
Maximum [Member]
Apr. 27, 2014
Customer Relationships [Member]
Jan. 26, 2014
Customer Relationships [Member]
Apr. 27, 2014
Customer Relationships [Member]
Minimum [Member]
Apr. 27, 2014
Customer Relationships [Member]
Maximum [Member]
Apr. 27, 2014
Technology Licenses [Member]
Jan. 26, 2014
Technology Licenses [Member]
Apr. 27, 2014
Technology Licenses [Member]
Minimum [Member]
Apr. 27, 2014
Technology Licenses [Member]
Maximum [Member]
Apr. 27, 2014
Other Intangible Assets [Member]
Jan. 26, 2014
Other Intangible Assets [Member]
Apr. 27, 2014
Other Intangible Assets [Member]
Minimum [Member]
Apr. 27, 2014
Other Intangible Assets [Member]
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]                                    
Estimated useful life         2 years 10 years     7 years 10 years     5 years 10 years     1 year 5 years
Gross carrying amount $ 185,997 $ 185,997 $ 146,925 $ 146,925     $ 28,630 $ 28,630     $ 3,842 [1] $ 3,842 [1]     $ 6,600 $ 6,600    
Accumulated amortization (55,792) (49,053) (40,587) (35,357)     (8,542) (7,505)     (674) [1] (367) [1]     (5,989) (5,824)    
Net carrying amount $ 130,205 $ 136,944 $ 106,338 $ 111,568     $ 20,088 $ 21,125     $ 3,168 [1] $ 3,475 [1]     $ 611 $ 776    
[1] Technology licenses relate to licensing agreements entered into by the Company that are used in research and development activities and have alternative future uses. Amortization expense related to technology licenses is reported as “Product development and engineering” in the unaudited consolidated condensed statements of income.