Discontinued Operations (Narrative) (Details) (USD $)	3 Months Ended		0 Months Ended	3 Months Ended		2 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Jan. 11, 2012 Albany Door Systems [Member]	Mar. 31, 2012 Albany Door Systems [Member]	Mar. 31, 2013 Albany Door Systems [Member]	Jun. 29, 2012 PrimaLoft Products [Member]	Jun. 30, 2012 PrimaLoft Products [Member]	Dec. 31, 2012 PrimaLoft Products [Member]	Mar. 31, 2013 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			$ 38,000,000
Gain on sale of discontinued business		57,968,000		58,000,000			34,900,000
Pre-tax gain receivable				17,400,000
Noncurrent portion of purchase price					13,000,000
Noncurrent portion of purchase price, at present value					12,900,000
Cash held in escrow									3,800,000
Income tax expense pertaining to cash repatriations								$ 5,400,000