Activity in Recorded Workforce Reduction Liabilities (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Restructuring Cost and Reserve [Line Items]
Workforce reduction charges	$ 13,141	[1]

[1] The six months ended June 30, 2012 includes a charge of $13.1 million relating to reduction in force liabilities associated with our exit of the phosphorous flame retardants business noted above. The majority of the payments for this liability are expected to occur in 2012.