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INVENTORIES (Details) - USD ($)
$ in Thousands
Oct. 02, 2021
Dec. 31, 2020
Inventory at FIFO    
Finished products $ 4,946 $ 2,878
Materials and work in process 87,529 77,609
Gross inventories 92,475 80,487
Less: LIFO reserve (49,473) (48,016)
Less: excess and obsolescence reserve (3,887) (3,394)
Net inventories $ 39,115 $ 29,077