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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2014
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Table

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

   December 31,
   2014 2013
Land and land improvements $39,688 $37,156
Buildings and leasehold improvements  256,603  205,638
Production and other equipment  367,716  336,135
Construction in progress  20,606  80,420
 Total property, plant and equipment  684,613  659,349
Less: accumulated depreciation and amortization  (363,030)  (334,417)
 Property, plant and equipment, net $321,583 $324,932