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Goodwill and Acquired Intangibles (Details 3) (USD $)
In Thousands, unless otherwise specified
Mar. 29, 2014
Dec. 28, 2013
Estimated amortization expense    
2014 – remaining period $ 38,792  
2015 51,220  
2016 45,360  
2017 41,550  
2018 38,609  
Thereafter 97,395  
Acquired intangibles, net $ 312,926 $ 308,183