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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2013
Property Plant And Equipment [Abstract]  
Summary of Carrying Values of Property, Plant and Equipment

The carrying values of property, plant and equipment were as follows:

 

     December 31,  
     2013     2012  
     (In thousands)  

Land and land improvements

    $ 34,846      $ 35,010   

Buildings and leasehold improvements

      124,688        136,751   

Machinery and equipment

      441,933        438,928   

Computer equipment and software

      89,919        92,946   

Construction in process

      36,388        27,135   
  

 

 

    

 

 

  

Gross property, plant and equipment

      727,774        730,770   

Accumulated depreciation

      (426,939 )      (423,722 ) 
  

 

 

    

 

 

  

Net property, plant and equipment

    $ 300,835      $ 307,048