Inventories (Tables)

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Schedule of Major Components of Inventories

The major components of inventories were as follows:

	December 31,
	2020		2019
Petroleum products	$	5,840	$	2,721
Crude oil	37,661		5,271
Caustic soda	5,167		5,965
NaHS	9,101		10,845
Raw materials - Alkali Operations	7,120		6,238
Work-in-process - Alkali Operations	9,355		8,579
Finished goods, net - Alkali Operations	13,002		14,168
Materials and supplies, net - Alkali Operations	12,631		11,350
Total	$	99,877	$	65,137