Acquisitions, Goodwill And Other Intangible Assets (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended				9 Months Ended	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Marine And Leisure Operation [Member]	Sep. 30, 2012 Euramax Internation, Inc - RV Entry Door Operation [Member]	Dec. 31, 2011 Euramax Internation, Inc - RV Entry Door Operation [Member]	Feb. 21, 2012 Euramax Internation, Inc - RV Entry Door Operation [Member]
Acquisition, Goodwill and Other Intangible Assets [Line Items]
Net sales	$ 226,323	$ 166,689	$ 700,889	$ 521,570				$ 6,000
Purchase price									1,646
Purchase price cash paid at closing									1,164
Balance of purchase price to be paid, period							3 years
Other intangible assets	$ 71,755	$ 80,746	$ 71,755	$ 80,746	$ 79,059	$ 2,000
Estimated useful life in years							7 years