Accumulated Other Comprehensive Income (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)		Sep. 30, 2017 USD ($)
Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance			$ 835,741
Other comprehensive (loss) income before reclassifications	$ 12,390		56,849
Amounts reclassified from OCI	(4)		8,025
Ending balance	879,532		879,532
Flavors & Fragrances [Member]
Accumulated Other Comprehensive Loss [Roll Forward]
Translation adjustment functional to reporting currency, net of tax	(2,800)		(2,800)
European Natural Ingredients Business [Member]
Accumulated Other Comprehensive Loss [Roll Forward]
Translation adjustment functional to reporting currency, net of tax	(4,000)		(4,000)
Accumulated Other Comprehensive (Loss) Income [Member]
Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	(160,977)		(213,465)
Ending balance	(148,591)		(148,591)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	161	[1]	(85)	[1]
Other comprehensive (loss) income before reclassifications	(437)	[1]	(46)	[1]
Amounts reclassified from OCI	22	[1]	(123)	[1]
Ending balance	(254)	[1]	(254)	[1]
Pension Items [Member]
Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	(1,145)	[1]	(2,537)	[1]
Other comprehensive (loss) income before reclassifications	0	[1]	0	[1]
Amounts reclassified from OCI	(26)	[1]	1,366	[1]
Ending balance	(1,171)	[1]	(1,171)	[1]
Translation adjustment functional to reporting currency, net of tax	(1,500)		(1,500)
Foreign Currency Items [Member]
Accumulated Other Comprehensive Loss [Roll Forward]
Beginning balance	(159,993)		(210,843)
Other comprehensive (loss) income before reclassifications	12,827		56,895
Amounts reclassified from OCI	0		6,782
Ending balance	$ (147,166)		$ (147,166)

[1] Cash Flow Hedges and Pension Items are net of tax.