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Inventories
12 Months Ended
Dec. 27, 2014
Inventory Disclosure [Abstract]  
Inventories
INVENTORIES

Inventories are summarized as follows:
 
2014
 
2013
Raw materials
$
40,649

 
$
31,864

Work-in-process
19,976

 
16,880

Finished goods
57,913

 
57,983

Supplies and other
126

 
118

LIFO reserve
(14,457
)
 
(13,626
)
Inventories
$
104,207

 
$
93,219