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Property, Plant and Equipment (Tables)
12 Months Ended
Dec. 28, 2013
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, plant and equipment are as follows (in thousands):
 
 
 
2013
 
2012
Land and land improvements
 
$
14,507

 
$
17,283

Buildings and building improvements
 
97,674

 
103,326

Machinery and equipment
 
635,638

 
579,570

Furniture and fixtures
 
11,049

 
11,170

Construction in progress
 
11,828

 
7,060

 
 
770,696

 
718,409

Accumulated depreciation
 
(465,789
)
 
(439,331
)
 
 
$
304,907

 
$
279,078