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Inventories
3 Months Ended
Mar. 30, 2013
Notes To Financial Statements [Abstract]  
Inventories
Inventories
Inventories are composed of material, labor and overhead and are stated at the lower of cost or market. Costs for inventories at two of the company's manufacturing facilities have been determined using the last-in, first-out ("LIFO") method. These inventories under the LIFO method amounted to $23.1 million at March 30, 2013 and $22.2 million at December 29, 2012 and represented approximately 12.4% and 14.5% of the total inventory in each respective period. The amount of LIFO reserve at March 30, 2013 and December 29, 2012 was not material. Costs for all other inventory have been determined using the first-in, first-out ("FIFO") method. The company estimates reserves for inventory obsolescence and shrinkage based on its judgment of future realization. Inventories at March 30, 2013 and December 29, 2012 are as follows: 
 
Mar 30, 2013

 
Dec 29, 2012

 
(in thousands)
Raw materials and parts
$
104,120

 
$
87,184

Work-in-process
27,290

 
18,957

Finished goods
55,616

 
47,349

 
$
187,026

 
$
153,490