Total costs accrued as of the balance sheet date for environmental loss contingencies.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Name:	us-gaap_AccrualForEnvironmentalLossContingencies
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Jun. 30, 2012	Dec. 31, 2012
Loss Contingencies [Line Items]
Potential revision on future environmental remediation costs before tax	$ 15,000,000
Estimated site remediation liabilities	19,185,000		20,322,000
Exit of phosphorous flame retardants business		8,700,000
Bergheim, Germany Site
Loss Contingencies [Line Items]
Estimated site remediation liabilities	7,500,000
Closure project, scheduled completion year	2017
Period of post-closure monitoring	30 years thereafter
Pledged land and housing facilities	$ 5,700,000