Discontinued Operations (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jan. 11, 2012 Albany Door Systems [Member]	Apr. 30, 2012 Albany Door Systems [Member]	Dec. 31, 2012 Albany Door Systems [Member]	Dec. 31, 2011 Albany Door Systems [Member]	Dec. 31, 2012 PrimaLoft Products [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of business				$ 130,000,000	$ 5,000,000			$ 38,000,000
Gain on sale of discontinued businesses	92,296,000			57,400,000				34,900,000
Noncurrent portion of purchase price						13,000,000
Noncurrent portion of purchase price, at present value						12,800,000
Cash held in escrow								3,800,000
Income tax expense pertaining to cash repatriations			$ (2,262,000)			$ 5,400,000	$ 2,600,000