CONSOLIDATED STATEMENT OF SHAREHOLDERS EQUITY - USD ($) $ in Thousands	Total	Common stock [Member]	Capital in excess of par value [Member]	Retained earnings [Member]	Accumulated other comprehensive (loss) income [Member]	Treasury stock [Member]	Non-controlling interest [Member]
Beginning Balance at Dec. 31, 2015	$ 1,594,989	$ 14,470	$ 140,802	$ 3,604,254	$ (613,440)	$ (1,555,769)	$ 4,672
Beginning Balance, shares at Dec. 31, 2015						(35,835,899)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	405,249			405,031			218
Cumulative translation adjustment	(54,526)				(54,526)
Gains (losses) on derivatives qualifying as hedges; net of tax	(1,797)				(1,797)
Pension liability and postretirement adjustment; net of tax	(10,332)				(10,332)
Cash dividends declared	(190,750)			(190,750)
Stock options	10,287		8,952			$ 1,335
Stock options, shares						30,015
Treasury share repurchases, shares						(1,058,018)
Treasury share repurchases, value	(127,443)					$ (127,443)
Vested restricted stock units and awards, value	(19,130)		(21,860)			$ 2,730
Vested restricted stock units and awards, shares						218,749
Stock-based compensation, value	24,587		24,587
Ending Balance at Dec. 31, 2016	1,631,134	14,470	152,481	3,818,535	(680,095)	$ (1,679,147)	4,890
Ending Balance, shares at Dec. 31, 2016						(36,645,153)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment | Accounting Standards Update 2016-16 [Member]	(33,719)			(33,719)
Net income	295,867			295,665			202
Cumulative translation adjustment	54,609				54,609
Gains (losses) on derivatives qualifying as hedges; net of tax	(17,936)				(17,936)
Pension liability and postretirement adjustment; net of tax	5,940				5,940
Cash dividends declared	(209,860)			(209,860)
Stock options	5,766		4,558			$ 1,208
Stock options, shares						24,423
Treasury share repurchases, shares						(459,264)
Treasury share repurchases, value	(58,069)					$ (58,069)
Vested restricted stock units and awards, value	(11,005)		(20,779)			$ 9,774
Vested restricted stock units and awards, shares						169,185
Stock-based compensation, value	26,567		26,567
Ending Balance at Dec. 31, 2017	$ 1,689,294	14,470	162,827	3,870,621	(637,482)	$ (1,726,234)	5,092
Ending Balance, shares at Dec. 31, 2017	(36,910,809)					(36,910,809)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative adjustment | Accounting Standards Update 2014-09 [Member]	$ 2,068			2,068
Net income	338,933			337,302			1,631
Cumulative translation adjustment	(99,580)				(99,580)
Gains (losses) on derivatives qualifying as hedges; net of tax	15,078				15,078
Pension liability and postretirement adjustment; net of tax	19,757				19,757
Cash dividends declared	(253,577)			(253,577)
Stock options	4,340		2,152			$ 2,188
Stock options, shares						46,474
Impact of Frutarom acquisition	2,051,040		1,346,229			$ 701,111	3,700
Impact of Frutarom acquisition, shares						14,901,445
Treasury share repurchases, shares						(108,109)
Treasury share repurchases, value	(15,475)					$ (15,475)
Vested restricted stock units and awards, value	(2,958)		(10,650)			$ 7,692
Vested restricted stock units and awards, shares						164,064
Stock-based compensation, value	29,401		29,401
Issuance of equity	2,268,094	1,596	2,266,498
Redeemable NCI	(2,848)		(2,848)
Other	(193)			(193)
Ending Balance at Dec. 31, 2018	$ 6,043,374	$ 16,066	$ 3,793,609	$ 3,956,221	$ (702,227)	$ (1,030,718)	$ 10,423
Ending Balance, shares at Dec. 31, 2018	(21,906,935)					21,906,935