Discontinued Operations (Narrative) (Details) (USD $)	12 Months Ended			1 Months Ended	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Jun. 30, 2012	Jan. 11, 2012	Jun. 29, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain/(loss) on sale of discontinued businesses			$ 92,296,000
Income tax expense pertaining to cash repatriations	2,210,000	618,000
Albany Door Systems [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales price operations		135,000,000					130,000,000
Proceeds from sale of business			122,000,000
Gain/(loss) on sale of discontinued businesses					57,400,000
Adjustments to the sale transaction				5,000,000
Income tax expense pertaining to cash repatriations			5,400,000
PrimaLoft Products [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales price operations								38,000,000
Proceeds from sale of business		3,800,000
Gain/(loss) on sale of discontinued businesses						$ 34,900,000