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Inventories
6 Months Ended
Jun. 30, 2014
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
Inventories consist of the following: 
 
 
June 30,
 
December 31
 
 
2014
 
2013
 
 
(In thousands)
Coal
 
$
101,195

 
$
117,531

Repair parts and supplies
 
127,531

 
137,497

Work-in-process
 

 
9,133

 
 
$
228,726

 
$
264,161


 
The repair parts and supplies are stated net of an allowance for slow-moving and obsolete inventories of $8.7 million at June 30, 2014 and $8.4 million at December 31, 2013.