Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Inventory, Net    
Finished products and work in process $ 44,171 $ 48,500
Raw materials 4,763 4,289
Inventories, net 48,934 52,789
Valued at lower of cost or market:    
LIFO basis 32,074 31,072
Valued at lower of cost and net realizable value:    
FIFO or average cost basis 16,860 21,717
Inventories, net $ 48,934 $ 52,789