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Property, Plant And Equipment
12 Months Ended
Dec. 31, 2012
Property, Plant And Equipment [Abstract]  
Property, Plant And Equipment
Note 3—Property, Plant and Equipment            
Property, plant and equipment consists of the following:            
    December 31,  
(in thousands)   2012     2011  
Land   $ 6,172     $ 6,172  
Buildings and building improvements     85,668       79,420  
Machinery and equipment     390,237       363,803  
Furniture and fixtures     6,799       7,351  
Vehicles     893       784  
Leasehold improvements     14,200       17,708  
Construction in progress     2,147       1,405  
      506,116       476,643  
Less accumulated depreciation     (330,012 )     (312,983 )
    $ 176,104     $ 163,660