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INVENTORIES (Tables)

12 Months Ended

Dec. 31, 2019

INVENTORIES

Schedule of inventories

​

​	​	​	​	​	​	​	​
​	​	December 31,					​
​	​	2019			2018
​	​	(in thousands)					​
​	​	​	​	​	​	​	​
Coal	​	$	63,645	​	$	20,929	​
Supplies (net of reserve for obsolescence of $5,555 and $5,453, respectively)	​		37,660	​		38,277	​
Total inventories, net	​	$	101,305	​	$	59,206	​

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- Definition

Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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