Inventories (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 30, 2011
Inventory Disclosure [Abstract]
Aluminum and steel coil	$ 58,153	$ 59,651
Raw materials	15,291	14,520
Work in process	1,936	1,598
Finished products	14,380	13,525
Inventories, net	89,760	89,294
Summary of Obsolete Inventory Reserve [Roll Forward]
Balance, beginning of year	2,911	3,009	2,405
Charges to costs and expenses	3,972	4,386	3,626
Write-offs	(4,487)	(4,534)	(2,998)
Foreign currency translation	45	50	(24)
Balance, end of year	$ 2,441	$ 2,911	$ 3,009