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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Jun. 30, 2012	Sep. 30, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Potential revision on future environmental remediation costs before tax		$ 17,000,000
Estimated site remediation liabilities		17,025,000	20,322,000
Exit of phosphorous flame retardants business	8,700,000
Bergheim, Germany Site
Loss Contingencies [Line Items]
Estimated site remediation liabilities		7,300,000
Pledged land and housing facilities		$ 6,000,000