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Property, Plant and Equipment
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, Plant and Equipment
 
Property, plant and equipment at December 31 consisted of:
 
 
 
2012
 
2011
Land
 
$
15,260

 
$
14,995

Buildings
 
127,117

 
119,286

Machinery and equipment
 
492,087

 
469,102

 
 
634,464

 
603,383

Less accumulated depreciation
 
(401,367
)
 
(392,599
)
 
 
$
233,097

 
$
210,784


 
Depreciation expense was $34,218, $36,772 and $36,026 during 2012, 2011 and 2010, respectively.