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INVENTORIES (Tables)
 12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Inventories
Inventories consisted of the following:
 
December 31,
 
2016
 
2015
 
(In thousands)
 
 
 
Restated
Coal stockpiles
$
44,692

 
$
38,934

Coal fuel inventories
6,816

 
7,194

Materials and supplies
77,628

 
78,784

Reserve for obsolete inventory
(3,621
)
 
(2,756
)
Total
$
125,515

 
$
122,156