Divestiture-Related Activities (Narrative) (Detail) (USD $)	1 Months Ended		3 Months Ended		9 Months Ended	1 Months Ended
	Aug. 26, 2012	Dec. 02, 2011	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2012	Sep. 30, 2012 Marine Business [Member]	Mar. 22, 2011 Marine Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposal of an asset held for sale				$ 300,000
Retained liability expenses on divested business			900,000		1,100,000
Proceeds from sale of business	45,000,000	280,000,000					123,100,000
Gain from sale of business	25,000
Gain recognized on sale of discontinued operations		126,800,000					57,300,000
Working capital adjustment				16,800,000
Additional gain on sale of discontinued operations				2,200,000
Cash proceeds from sale of business							103,100,000
Cash included as part of net assets sold							1,500,000
Subordinated promissory note							4,500,000
Liabilities assumed							15,500,000
Accumulated loss realized from pension and postretirement obligations							8,400,000
Cumulative translation gains							33,400,000
Accumulated other comprehensive income							25,000,000
Net cash proceeds							101,600,000
Accrued interest paid						$ 700,000