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Inventories (Tables)
9 Months Ended
Sep. 30, 2014
Inventory Disclosure [Abstract]  
Inventory components
 
September 30,
2014
 
December 31,
2013
Coal
$
24,380

 
$
31,944

Merchandise for resale
35,836

 
38,263

Supplies
85,156

 
87,707

Total Inventories
$
145,372

 
$
157,914