Segment Information, Segment Contribution (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Contribution [Abstract]
Operating income	$ 257,564	$ 267,426	$ 240,860
Other income (expense)	(1,332)	(12,254)	(21,194)
Income before provision for income taxes	256,232	255,172	219,666
Operating Segment [Member]
Segment Contribution [Abstract]
Operating income	573,431	532,036	595,211
Operating Segment [Member] | Nu Skin [Member]
Segment Contribution [Abstract]
Operating income	574,693	535,852	596,685
Operating Segment [Member] | Mainland China [Member]
Segment Contribution [Abstract]
Operating income	181,024	191,570	253,598
Operating Segment [Member] | Americas/Pacific [Member]
Segment Contribution [Abstract]
Operating income	91,627	57,090	52,433
Operating Segment [Member] | South Korea [Member]
Segment Contribution [Abstract]
Operating income	100,933	99,892	107,215
Operating Segment [Member] | Southeast Asia [Member]
Segment Contribution [Abstract]
Operating income	75,538	82,455	78,598
Operating Segment [Member] | Japan [Member]
Segment Contribution [Abstract]
Operating income	68,027	61,081	56,676
Operating Segment [Member] | EMEA [Member]
Segment Contribution [Abstract]
Operating income	24,078	10,195	14,773
Operating Segment [Member] | Hong Kong/Taiwan [Member]
Segment Contribution [Abstract]
Operating income	33,466	33,569	33,392
Operating Segment [Member] | Manufacturing [Member]
Segment Contribution [Abstract]
Operating income	21,168	15,693	7,754
Operating Segment [Member] | Grow Tech [Member]
Segment Contribution [Abstract]
Operating income	(22,430)	(19,509)	(9,228)
Corporate and Other [Member]
Segment Contribution [Abstract]
Operating income	$ (315,867)	$ (264,610)	$ (354,351)