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INTANGIBLE ASSETS AND GOODWILL - Amortization (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 25, 2017
Jun. 26, 2016
Jun. 25, 2017
Jun. 26, 2016
INTANGIBLE ASSETS AND GOODWILL        
Amortization expense $ 12,093 $ 11,996 $ 24,176 $ 23,994
Estimated amortization expense        
2017 (remainder) 25,114   25,114  
2018 47,660   47,660  
2019 24,154   24,154  
2020 803   803  
2021 680   680  
2022 $ 655   $ 655