Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS - Narrative (Details)

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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 28, 2019
Jan. 02, 2021
Dec. 28, 2019
Dec. 29, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-term debt, carrying value   $ 912,957 $ 913,269  
Impairment of operating lease assets   5,900    
Impairment of property, plant and equipment   900    
Non-cash impairment of intangible asset $ 32,600 0 32,636 $ 0
Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-term debt, fair value   $ 916,000 $ 906,100