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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Table

Property, plant and equipment consist of the following (in thousands):

   December 31,
   2013 2012
Land and land improvements $37,156 $35,734
Buildings and leasehold improvements  205,638  196,554
Production and other equipment  336,135  317,285
Construction in progress  80,420  37,750
 Total property, plant and equipment  659,349  587,323
Less: accumulated depreciation and amortization  (334,417)  (314,044)
 Property, plant and equipment, net $324,932 $273,279