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INTANGIBLE ASSETS AND GOODWILL - Amortization (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 27, 2016
Mar. 29, 2015
INTANGIBLE ASSETS AND GOODWILL    
Amortization expense $ 11,998 $ 12,140
Estimated amortization expense    
2016 (remainder) 35,988  
2017 48,907  
2018 47,275  
2019 23,769  
2020 418  
2021 $ 296