Net Income Per Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended	12 Months Ended
	Oct. 04, 2018	Sep. 17, 2018	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Difference amount between basic and diluted net income per share (in dollars per share)				$ 0.02	$ 0.01	$ 0.01
Net income				$ 339,781	$ 295,665	$ 405,031
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income				$ 1,000	$ 1,000	$ 1,000
Public Offering [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issued in transaction (in shares)		12,667,947	14,901,445
Net proceeds from transaction		$ 1,600,000
Frutarom Industries Ltd. [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Business acquisition, equity interest (in shares)	14,900,000
Exchange ratio per share	0.2490
Cumulative percentage ownership after transaction	14.00%