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Property, Plant, And Equipment, At Cost (Tables)
12 Months Ended
Dec. 31, 2011
Property, Plant, And Equipment, At Cost [Abstract]  
Schedule Of Property, Plant, And Equipment, At Cost
     December 31  
     2011      2010  

Land

   $ 42,771       $ 39,302   

Land improvements

     31,112         31,366   

Leasehold improvements

     1,333         1,278   

Buildings

     186,960         174,328   

Machinery and equipment

     748,051         712,829   

Construction in progress

     24,245         29,077   
  

 

 

    

 

 

 
   $ 1,034,472       $ 988,180   
  

 

 

    

 

 

 
Schedule Of Useful Lives Of Property Plant And Equipment

Land improvements

     5 - 30 years   

Buildings

     10 - 50 years   

Machinery and equipment

     315 years