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Property and equipment (Tables)
12 Months Ended
Dec. 31, 2013
Property and Equipment

Property and equipment consist of the following (dollar amounts in thousands):

 

     Estimated
Useful
Life
(Years)
     December 31,  
        2012     2013  

Land

           $ 5,273      $ 5,273   

Buildings

     39-40         54,948        54,948   

Building improvements

     5-40         114,245        114,099   

Machinery and equipment

     3-15         81,382        82,189   

Furniture, fixtures and office equipment

     5-10         5,239        5,046   

Computer equipment and software

     3         11,840        11,289   

Leasehold improvements

     4         17        17   

Construction in progress

        12,266        14,756   
     

 

 

   

 

 

 
        285,210        287,617   

Less accumulated depreciation and amortization

        (101,249     (111,060
     

 

 

   

 

 

 

Total property and equipment, net

      $ 183,961      $ 176,557