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Inventories, net (Tables)
9 Months Ended
Sep. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventories, Net
Inventories, net are summarized as follows (in thousands):
 
 
Successor
 
September 30, 2017
 
December 31, 2016
Coal
$
12,691

 
$
18,788

Raw materials, parts, supplies and other, net
21,211

 
20,632

Total inventories, net
$
33,902

 
$
39,420