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DERIVATIVE FINANCIAL INSTRUMENTS -Accumulated balances and reporting period activities (Details)
$ in Thousands
12 Months Ended
Dec. 27, 2019
USD ($)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]  
Balances $ 144,289
Balances 167,278
(Loss) on Derivative Instruments  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]  
Other comprehensive loss before reclassifications (546)
Income tax benefit (expense) related to derivative instruments 150
Net current-period other comprehensive loss (396)
Balances (396)
Accumulated Other Comprehensive (Loss)/Gain  
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]  
Other comprehensive loss before reclassifications (546)
Income tax benefit (expense) related to derivative instruments 150
Net current-period other comprehensive loss (396)
Balances $ (396)