INVENTORIES (Tables)

12 Months Ended

Dec. 31, 2020

INVENTORIES [Abstract]

Inventories

in thousands	2020	2019
Inventories
Finished products 1	$      378,389	$     391,666
Raw materials	33,780	31,318
Products in process	4,555	5,604
Operating supplies and other	31,861	29,720
Total	$      448,585	$     458,308

¹ Includes inventories encumbered by volumetric production payments (see Note 2), as follows: December 31, 2020 — $2,416 thousand and December 31, 2019 — $2,861 thousand.