Annual report pursuant to Section 13 and 15(d)

PENSION AND OTHER RETIREMENTS BENEFITS - Net Periodic Benefit Costs Reflected in the Company's Financial Statements (Details)

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PENSION AND OTHER RETIREMENTS BENEFITS - Net Periodic Benefit Costs Reflected in the Company's Financial Statements (Details) - Pension Plan - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Dec. 31, 2020
Jun. 25, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure        
Net periodic benefit (credit) cost $ (169) $ 126 $ 2,438 $ 2,170
Cost of Goods Sold        
Defined Benefit Plan Disclosure        
Net periodic benefit (credit) cost 0 0 614 500
Selling, general and administrative expense        
Defined Benefit Plan Disclosure        
Net periodic benefit (credit) cost 69 41 1,824 1,670
Other (expense) income, net        
Defined Benefit Plan Disclosure        
Net periodic benefit (credit) cost $ (238) $ 85 $ 0 $ 0