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Property and equipment (Tables)
6 Months Ended
Jun. 30, 2014
Property and Equipment

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

 

     Estimated
Useful
Life
(Years)
     June 30,
2014
    December 31,
2013
 

Land

     —         $ 5,273      $ 5,273   

Buildings

     39-40         54,948        54,948   

Building improvements

     5-40         114,131        114,099   

Machinery and equipment

     3-15         81,960        82,189   

Furniture, fixtures and office equipment

     5-10         5,087        5,046   

Computer equipment and software

     3         11,265        11,289   

Leasehold improvements

     4         17        17   

Construction in progress

        26,651        14,756   
     

 

 

   

 

 

 
        299,332        287,617   

Less accumulated depreciation and amortization

        (115,799     (111,060
     

 

 

   

 

 

 

Property and equipment — net

      $ 183,533      $ 176,557   
     

 

 

   

 

 

 
Depreciation and Amortization Expense

Depreciation and amortization expense related to property and equipment for the three and six months ended June 30, 2014 and 2013 was as follows (in thousands):

 

     Three months ended
June 30,
     Six months ended
June 30,
 
     2014      2013      2014      2013  

Depreciation and amortization expense

   $ 2,449       $ 2,956       $ 4,972       $ 5,946