XML 47 R36.htm IDEA: XBRL DOCUMENT v3.20.2
Acquisition-Related Obligations (Tables)
 6 Months Ended
Jun. 30, 2020
Fair Value Disclosures [Abstract]  
Schedule of Acquisition-Related Obligations Acquisition-related obligations consisted of the following:
June 30, 2020December 31, 2019
Contingent Revenue Obligation$20,668  $52,427  
Environmental Settlement Obligations14,241  16,305  
Reclamation Funding Liability12,000  12,000  
UMWA Funds Settlement Liability4,000  4,000  
Discount(2,607) (4,834) 
Total acquisition-related obligations48,302  79,898  
Less current portion(30,019) (33,639) 
Acquisition-related obligations, net of current portion$18,283  $46,259