Other Intangibles (Parenthetical) (Detail) (USD $)						12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2012 Trade Names	Dec. 31, 2012 Phosphorous Flame Retardant Business Exit	Dec. 31, 2011 Caitlin Inc.
Finite-Lived Intangible Assets [Line Items]
Acquisitions	$ 1,500,000	[1]	$ 1,400,000	[2]			$ 1,400,000
Intangible assets, reduction						44,100,000
Intangible assets, accumulated amortization, reduction						16,800,000
Indefinite-lived intangible asset, gross carrying amount					$ 10,300,000

[1] The increase of $1.5 million in Patents and Technology relates to our acquisition of certain patents in 2012 related to catalysts useful in the production of fuel products from renewable feedstocks.

[2] The increase of $1.4 million in Patents and Technology relates to our acquisition of Catilin, Inc. in 2011 as discussed in Note 22 "Acquisitions."