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Inventories (Table)
3 Months Ended
Mar. 31, 2013
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories are summarized as follows:

 
MARCH 31
2013
 
DECEMBER 31
2012
Coal - NACoal
$
14,685

 
$
17,311

Mining supplies - NACoal
15,299

 
13,587

Total inventories at weighted average cost
29,984

 
30,898

Sourced inventories - HBB
80,007

 
84,814

Retail inventories - KC
52,243

 
53,728

Total inventories at FIFO
132,250

 
138,542

 
$
162,234

 
$
169,440