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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
   
December 31,
 
   
2012
  
2011
 
   
(In thousands)
 
Land, buildings and improvements
 $44,750  $44,255 
Machinery and equipment
  128,453   125,654 
Tools, dies and auxiliary equipment
  33,501   31,958 
Furniture and fixtures
  23,266   22,091 
Leasehold improvements
  6,397   5,504 
Construction-in-progress
  5,583   5,952 
Total property, plant and equipment
  241,950   235,414 
Less accumulated depreciation
  177,528   171,375 
Total property, plant and equipment, net
 $64,422  $64,039