Acquisitions - Schedule of purchase price (Details) - USD ($) $ / shares in Units, $ in Thousands	Oct. 04, 2018	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Common stock, shares outstanding		106,619,202	78,947,381
Treasury stock, shares at cost		21,906,935	36,910,809
Common stock, shares issued		128,526,137	115,858,190
Frutarom Industries Ltd. [Member]
Business Acquisition [Line Items]
Cash transferred per share of common stock (in dollars per share)	$ 71.19
Total cash paid to shareholders of Frutarom	$ 4,241,238
Cash paid to vested stock option holders	19,229
Cash in escrow for unvested stock option holders	7,048
Cash paid for closing dividend	21,065
Cash in lieu of fractional shares	15
Cash portion of the purchase consideration	$ 4,288,595
Treasury stock, shares at cost	59,576,000
Exchange ratio per share	0.2490
Common stock, shares issued	14,835,000
Share price (usd per share)	$ 140
Total equity consideration paid to shareholders of Frutarom	$ 2,038,113
Equity consideration paid to vested stock Frutarom option holders (representing 67,046 shares)	9,211
Equity portion of purchase consideration	2,047,324
Repayment of existing credit facilities of Frutarom	694,975
Total purchase consideration	$ 7,030,894
Frutarom Industries Ltd. [Member] | Frutarom Industries Ltd. [Member]
Business Acquisition [Line Items]
Common stock, shares outstanding	59,576,000