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Inventories (Tables)
9 Months Ended
Sep. 30, 2012
Inventory Disclosure [Abstract]  
Inventories
Inventories consist of the following:
 
 
 
September 30, 2012
 
December 31, 2011
 
 
(In thousands)
Coal
 
$
202,103

 
$
206,517

Repair parts and supplies
 
178,710

 
163,527

Work-in-process
 
10,713

 
7,446

 
 
$
391,526

 
$
377,490