Inventories, net (Tables)

9 Months Ended

Sep. 30, 2020

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories, net consisted of the following: 

	September 30, 2020		December 31, 2019
Raw coal	$	18,248	$	30,274
Saleable coal	79,194		105,092
Materials, supplies and other, net (1)	26,803		27,293
Total inventories, net	$	124,245	$	162,659

(1) Includes an increase in allowance for obsolete material and supplies inventory of $807 recorded as restructuring expense during the three months ended June 30, 2020 (refer to Note 8).