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Property, Plant, and Equipment (Tables)
6 Months Ended
Jun. 30, 2012
Property, Plant and Equipment [Abstract]  
Major classes of property, plant, and equipment
Major classes of property, plant, and equipment consist of the following:
 
June 30,
2012
 
December 31,
2011
Land
$
9,682

 
$
8,861

Buildings and improvements
179,498

 
179,999

Machinery and equipment
193,345

 
194,055

 
382,525

 
382,915

Less accumulated depreciation
271,112

 
267,112

 
$
111,413

 
$
115,803