Segment Information, Segment Contribution (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Contribution [Abstract]
Operating income	$ 62,913	$ 36,565
Other income (expense)	1,582	(6,174)
Income before provision for income taxes	64,495	30,391
Operating Segment [Member]
Segment Contribution [Abstract]
Operating income	148,317	107,644
Operating Segment [Member] | Nu Skin [Member]
Segment Contribution [Abstract]
Operating income	148,582	111,645
Operating Segment [Member] | Mainland China [Member]
Segment Contribution [Abstract]
Operating income	39,439	37,387
Operating Segment [Member] | Americas/Pacific [Member]
Segment Contribution [Abstract]
Operating income	32,144	11,280
Operating Segment [Member] | South Korea [Member]
Segment Contribution [Abstract]
Operating income	26,525	24,099
Operating Segment [Member] | EMEA [Member]
Segment Contribution [Abstract]
Operating income	8,896	631
Operating Segment [Member] | Japan [Member]
Segment Contribution [Abstract]
Operating income	17,981	14,592
Operating Segment [Member] | Southeast Asia [Member]
Segment Contribution [Abstract]
Operating income	16,249	16,718
Operating Segment [Member] | Hong Kong/Taiwan [Member]
Segment Contribution [Abstract]
Operating income	7,348	6,938
Operating Segment [Member] | Manufacturing [Member]
Segment Contribution [Abstract]
Operating income	5,826	2,849
Operating Segment [Member] | Grow Tech [Member]
Segment Contribution [Abstract]
Operating income	(6,091)	(6,850)
Corporate and Other [Member]
Segment Contribution [Abstract]
Operating income	$ (85,404)	$ (71,079)