Pension Plans and Other Postretirement Benefits - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pension Contributions	$ 5,200	$ 4,800	$ 7,500	$ 6,800
Antioxidant, Ibuprofen and Propofol Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pension Contributions	$ 4,300		$ 4,322