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Property and equipment (Tables)
 12 Months Ended
Dec. 31, 2015
Property and Equipment

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

 

     Estimated
Useful
Life
(Years)		     

 

December 31,

  
        2015     2014  

Land

      —       $ 5,273      $ 5,273   

Buildings

      39-40         54,948        54,948   

Building improvements

      5-40         131,383        114,131   

Machinery and equipment

      3-15         95,182        80,919   

Furniture, fixtures and office equipment

      5-10         4,137        5,015   

Computer equipment and software

      3         9,707        10,465   

Leasehold improvements

      4         —        17   

Construction in progress

         8,044        39,580   
     

 

 

    

 

 

  
        308,674        310,348   

Less impairment

         (140,412 )      —   

Less accumulated depreciation and amortization

         (119,513 )      (118,221 ) 
     

 

 

    

 

 

  

Total property and equipment, net

       $ 48,749      $ 192,127