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Inventories (Tables)
3 Months Ended
Mar. 31, 2013
INVENTORIES: [Abstract]  
Inventory components
 
March 31,
2013
 
December 31,
2012
Coal
$
51,954

 
$
78,825

Merchandise for resale
35,120

 
35,363

Supplies
129,960

 
133,578

Total Inventories
$
217,034

 
$
247,766