Restructuring and Other Charges, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 0	$ 608	$ (170)	$ 912
Fragrance Ingredients Rationalization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge			(170)		$ 13,800
Restructuring, personnel-related costs					2,200
Restructuring, accelerated depreciation of fixed assets					10,300
Restructuring, plant shutdown and other related costs			$ 200
Facility Closing [Member] | Fragrance Ingredients Rationalization [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs					$ 1,300