Discontinued Operations (Additional Information) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes		$ (0.1)		$ (3.8)
Net sales associated with the discontinued operations		0.1	0.9	1.0
Thernal Management Solutions [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes			(6.8)
Discontinued Operation, Tax Effect of Discontinued Operation		(0.1)
Composite Material Division [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes		(0.4)	(0.2)
Net sales associated with the discontinued operations	5.3		4.8	5.0
Discontinued Operation, Tax Effect of Discontinued Operation		$ (0.1)	$ (0.2)	$ (0.1)