Inventories (Tables)

12 Months Ended

Dec. 31, 2012

Inventory Disclosure [Abstract]

Schedule of Inventory, Current

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

Summary of Obsolete Inventory Reserve

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