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Other Financial Statement Information (Tables)
6 Months Ended
Jun. 30, 2012
Other Financial Statement Information [Abstract]  
Inventories-net
                 
    June 30
2012
    December 31
2011
 

Finished products

  $ 42,812     $ 42,382  

Work-in-process

    9,349       9,196  

Raw materials

    45,686       46,700  
   

 

 

   

 

 

 
      97,847       98,278  

Excess of current cost over LIFO cost

    (5,613     (5,611

Noncurrent portion of inventory

    (3,549     (4,054
   

 

 

   

 

 

 
    $ 88,685     $ 88,613  
   

 

 

   

 

 

 
Property, plant and equipment - net
                 
    June 30     December 31  
    2012     2011  

Land and improvements

  $ 12,920     $ 10,283  

Buildings and improvements

    57,942       56,303  

Machinery and equipment

    128,664       125,668  

Construction in progress

    8,281       6,447  
   

 

 

   

 

 

 
      207,807       198,701  

Less accumulated depreciation

    119,447       115,841  
   

 

 

   

 

 

 
    $ 88,360     $ 82,860