Accumulated Other Comprehensive Income (Loss) - Components and Activity in Accumulated Other Comprehensive Income (Loss) (Net of Deferred Income Taxes) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income (loss) - Total - Beginning Balance	$ 116,245		$ 85,264	$ 60,329
Current Period Change	(179,131)		28,972	20,525
Tax benefit (expense)	473		2,009	4,410
Accumulated other comprehensive income (loss) - Total - Ending Balance	(62,413)		116,245	85,264
Foreign Currency Translation
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income (loss) - Total - Beginning Balance	116,465		85,117	56,245
Current Period Change	(163,456)	[1]	29,539	26,846	[1]
Tax benefit (expense)	(5,273)		1,809	2,026
Accumulated other comprehensive income (loss) - Total - Ending Balance	(52,264)		116,465	85,117
Pension and Postretirement Benefits
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income (loss) - Total - Beginning Balance	487		989	5,060
Current Period Change	(772)		(781)	(6,533)	[2]
Tax benefit (expense)	285		279	2,462
Accumulated other comprehensive income (loss) - Total - Ending Balance	0		487	989
Net Investment Hedge
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income (loss) - Total - Beginning Balance	0		0	0
Current Period Change	17,971	[3]	0	0
Tax benefit (expense)	(6,587)		0	0
Accumulated other comprehensive income (loss) - Total - Ending Balance	11,384		0	0
Interest Rate Swap
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income (loss) - Total - Beginning Balance	0		0	0
Current Period Change	(33,091)	[4]	0	0
Tax benefit (expense)	12,129		0	0
Accumulated other comprehensive income (loss) - Total - Ending Balance	(20,962)		0	0
Other
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accumulated other comprehensive income (loss) - Total - Beginning Balance	(707)		(842)	(976)
Current Period Change	217		214	212
Tax benefit (expense)	(81)		(79)	(78)
Accumulated other comprehensive income (loss) - Total - Ending Balance	$ (571)		$ (707)	$ (842)

[1] Current period change for the year ended December 31, 2012 includes $12.3 million related to a non-cash write-off of foreign currency translation adjustments from Accumulated other comprehensive (loss) income in connection with our exit of the phosphorus flame retardants business. See Note 20, “Restructuring and Other.” Current period change for the year ended December 31, 2014 includes $17.8 million related to a non-cash write-off of foreign currency translation adjustments from Accumulated other comprehensive (loss) income in connection with the sale of our antioxidant, ibuprofen and propofol businesses and assets which closed on September 1, 2014. See Note 2, “Discontinued Operations.”

[2] Current period change for the year ended December 31, 2012 includes $6.5 million related to a supplemental executive retirement plan settlement in connection with the retirement of our former CEO and executive chairman, and ($4.5) million related to various amendments to certain of our U.S. pension and defined contribution plans that were approved by our Board of Directors in the fourth quarter of 2012.

[3] Current period change for the year ended December 31, 2014 includes $12.8 million related to the revaluation of our euro-denominated senior notes and a $5.2 million gain on the settlement of related foreign currency forward contracts, both of which were designated as a hedge of our net investment in foreign operations. See Note 13, “Long-Term Debt” for additional information about these transactions.

[4] Current period change for the year ended December 31, 2014 includes a realized loss of ($33.4) million on the settlement of our forward starting interest rate swap which was designated and accounted for as a cash flow hedge under ASC 815, Derivatives and Hedging. See Note 13, “Long-Term Debt” for additional information about this interest rate swap.