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LONG-TERM DEBT (Schedule of Long Term Debt) (Details) - USD ($)
$ in Thousands
Jun. 29, 2019
Dec. 29, 2018
Jun. 30, 2018
Debt Instrument [Line Items]      
Long-term debt $ 604,377 $ 593,264 $ 682,778
Senior Notes [Member]      
Debt Instrument [Line Items]      
Long-term debt 500,000 400,000 400,000
Less unamortized issuance-related costs for senior notes (5,623) (2,736) (3,222)
Senior notes, net 494,377 397,264 396,778
Secured revolving credit facility [Member]      
Debt Instrument [Line Items]      
Long-term debt $ 110,000 $ 196,000 $ 286,000