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Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Inventories  
Inventories

    

September 30, 

    

December 31, 

 

2020

 

2019

(In thousands)

Coal

$

56,889

$

46,815

Repair parts and supplies

 

86,507

 

84,083

$

143,396

$

130,898