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Inventories
12 Months Ended
Dec. 31, 2012
Inventory Disclosure [Abstract]  
Inventories
Inventories

Inventories, net of the allowance for obsolete inventory, were comprised of:

 
December 31,
2012
 
December 30,
2011
Aluminum and steel coil
$
59,651

 
$
52,681

Raw materials
14,520

 
12,808

Work in process
1,598

 
2,980

Finished products
13,525

 
14,927

 
$
89,294

 
$
83,396


The Company has disclosed aluminum and steel coil inventory separately, as it represents inventory that can be classified as raw material, work in process or finished product. Aluminum and steel coil represent both painted and bare coil. Inventories are net of related reserves totaling $2.9 million and $3.0 million at December 31, 2012 and December 30, 2011, respectively.

Activity in the allowance for obsolete inventory was as follows:

 
2012
 
2011
 
2010
Balance, beginning of year
$
3,009

 
$
2,405

 
$
4,130

Net charges to costs and expenses
4,386

 
3,626

 
2,601

Write-offs
(4,534
)
 
(2,998
)
 
(4,232
)
Foreign currency translation
50

 
(24
)
 
(94
)
Balance, end of year
$
2,911

 
$
3,009

 
$
2,405