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Note 3. Property, Plant and Equipment
6 Months Ended
Jun. 30, 2011
Property, Plant and Equipment Disclosure [Text Block]
 (3) 
Property, Plant and Equipment

Property, plant and equipment are as follows (in thousands):

   
June 30,
2011
   
December 31,
2010
 
Property, plant, and equipment, at cost:
           
Land
  $ 9,905       7,751  
Mineral rights
    617,262       231,681  
Buildings, machinery and equipment
    573,413       423,617  
Mine development costs
    51,100       48,301  
Total property, plant, and equipment
    1,251,680       711,350  
Less accumulated depreciation, depletion, and amortization     361,698       325,698  
Property, plant and equipment, net
  $ 889,982       385,652