Segment Information, Segment Contribution (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Contribution [Abstract]
Operating income	$ 267,426	$ 240,860	$ 274,483
Other income (expense)	(12,254)	(21,194)	(8,916)
Income before provision for income taxes	255,172	219,666	265,567
Nu Skin [Member]
Segment Contribution [Abstract]
Operating income	535,852	596,685	518,849
Nu Skin [Member] | Mainland China [Member]
Segment Contribution [Abstract]
Operating income	191,570	253,598	211,625
Nu Skin [Member] | Americas/Pacific [Member]
Segment Contribution [Abstract]
Operating income	57,090	52,433	51,885
Nu Skin [Member] | South Korea [Member]
Segment Contribution [Abstract]
Operating income	99,892	107,215	100,964
Nu Skin [Member] | Southeast Asia [Member]
Segment Contribution [Abstract]
Operating income	82,455	78,598	63,296
Nu Skin [Member] | Japan [Member]
Segment Contribution [Abstract]
Operating income	61,081	56,676	51,372
Nu Skin [Member] | EMEA [Member]
Segment Contribution [Abstract]
Operating income	10,195	14,773	11,749
Nu Skin [Member] | Hong Kong/Taiwan [Member]
Segment Contribution [Abstract]
Operating income	33,569	33,392	27,958
Operating Segment [Member]
Segment Contribution [Abstract]
Operating income	532,036	595,211	518,849
Operating Segment [Member] | Manufacturing [Member]
Segment Contribution [Abstract]
Operating income	15,693	7,754	0
Operating Segment [Member] | Grow Tech [Member]
Segment Contribution [Abstract]
Operating income	(19,509)	(9,228)	0
Corporate and Other [Member]
Segment Contribution [Abstract]
Operating income	$ (264,610)	$ (354,351)	$ (244,366)