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Inventories
12 Months Ended
Dec. 31, 2014
Inventory Disclosure [Abstract]  
Inventories

4. Inventories

Inventories consist of the following:

 

     December 31,  
     2014      2013  
     (In thousands)  

Raw materials and supplies

   $ 107,357       $ 85,670   

Work in progress

     112,514         119,929   

Finished goods

     207,295         195,971   
  

 

 

    

 

 

 
  427,166      401,570   

Less: allowance for obsolete and excess inventory

  (34,607   (33,216
  

 

 

    

 

 

 

Total inventory

$ 392,559    $ 368,354   
  

 

 

    

 

 

 

Summary of allowance for excess and slow-moving inventory:

 

     In thousands  

Balance at December 31, 2011

   $ 26,228   

Charges to costs and expenses

     4,651   

Write-offs of inventory

     (453
  

 

 

 

Balance at December 31, 2012

  30,426   

Charges to costs and expenses

  3,554   

Write-offs of inventory

  (764
  

 

 

 

Balance at December 31, 2013

  33,216   

Charges to costs and expenses

  3,951   

Write-offs of inventory

  (2,560
  

 

 

 

Balance at December 31, 2014

$ 34,607