Goodwill and Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 30, 2011	Aug. 14, 2012
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 196,686,000	$ 199,999,000
Foreign currency translation	2,433,000	(3,313,000)
Acquisition of Cleveland Tubing, Inc			256,000
Goodwill, ending balance	199,375,000	196,686,000
Us Residential Products [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	71,987,000	71,987,000
Foreign currency translation	0	0
Acquisition of Cleveland Tubing, Inc			256,000
Goodwill, ending balance	72,243,000	71,987,000
Goodwill, Impaired [Abstract]
Goodwill, impaired, accumulated impairment loss	151,200,000	151,100,000
Us Commercial Products [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	9,067,000	9,067,000
Foreign currency translation	0	0
Acquisition of Cleveland Tubing, Inc			0
Goodwill, ending balance	9,067,000	9,067,000
Goodwill, Impaired [Abstract]
Goodwill, impaired, accumulated impairment loss	58,700,000	58,700,000
European Roll Coated Aluminum [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	103,292,000	106,560,000
Foreign currency translation	1,873,000	(3,268,000)
Acquisition of Cleveland Tubing, Inc			0
Goodwill, ending balance	105,165,000	103,292,000
Goodwill, Impaired [Abstract]
Goodwill, impaired, accumulated impairment loss	57,800,000	56,800,000
European Engineered Products [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	12,340,000	12,385,000
Foreign currency translation	560,000	(45,000)
Acquisition of Cleveland Tubing, Inc			0
Goodwill, ending balance	12,900,000	12,340,000
Goodwill, Impaired [Abstract]
Goodwill, impaired, accumulated impairment loss	$ 10,000,000	$ 9,600,000