Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Revenue from external customers	$ 338,475	$ 360,836	$ 679,872	$ 703,304
Total revenue	347,395	371,812	697,972	724,985
Operating income (loss)	44,380	43,665	68,417	91,184
Interest expense	4,717	4,637	9,528	9,437
Earnings before income taxes	39,663	39,028	58,889	81,747
Flavors & Fragrances [Member]
Segment Reporting Information [Line Items]
Total revenue	185,556	209,488	372,431	407,972
Color [Member]
Segment Reporting Information [Line Items]
Total revenue	132,894	132,201	266,960	258,683
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total revenue	28,945	30,123	58,581	58,330
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	0	0	0	0
Total revenue	0	0	0	0
Operating income (loss)	(17,014)	(25,758)	(57,114)	(39,598)
Interest expense	4,717	4,637	9,528	9,437
Earnings before income taxes	(21,731)	(30,395)	(66,642)	(49,035)
Operating Segments [Member] | Flavors & Fragrances [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	180,736	202,273	361,811	393,410
Operating income (loss)	28,502	35,461	57,272	63,108
Interest expense	0	0	0	0
Earnings before income taxes	28,502	35,461	57,272	63,108
Operating Segments [Member] | Color [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	129,253	128,478	260,093	251,642
Operating income (loss)	29,072	28,309	59,289	56,425
Interest expense	0	0	0	0
Earnings before income taxes	29,072	28,309	59,289	56,425
Operating Segments [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	28,486	30,085	57,968	58,252
Operating income (loss)	3,820	5,653	8,970	11,249
Interest expense	0	0	0	0
Earnings before income taxes	3,820	5,653	8,970	11,249
Intersegment Revenue [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	8,920	10,976	18,100	21,681
Intersegment Revenue [Member] | Flavors & Fragrances [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	4,820	7,215	10,620	14,562
Intersegment Revenue [Member] | Color [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	3,641	3,723	6,867	7,041
Intersegment Revenue [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	459	38	613	78
Intersegment Revenue [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenue from external customers	$ 0	$ 0	$ 0	$ 0