Segment Information, Segment Contribution (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Contribution [Abstract]
Operating income	$ 74,228	$ 69,892	$ 168,867	$ 212,747
Other income (expense)	525	(4,979)	(4,068)	(11,153)
Income before provision for income taxes	74,753	64,913	164,799	201,594
Operating Segment [Member]
Segment Contribution [Abstract]
Operating income	162,267	132,961	404,845	412,148
Operating Segment [Member] | Nu Skin [Member]
Segment Contribution [Abstract]
Operating income	160,840	134,206	407,504	414,583
Operating Segment [Member] | Mainland China [Member]
Segment Contribution [Abstract]
Operating income	54,522	48,619	135,577	158,873
Operating Segment [Member] | Americas/Pacific [Member]
Segment Contribution [Abstract]
Operating income	26,256	12,875	61,184	41,314
Operating Segment [Member] | South Korea [Member]
Segment Contribution [Abstract]
Operating income	25,232	24,770	73,421	76,417
Operating Segment [Member] | Southeast Asia [Member]
Segment Contribution [Abstract]
Operating income	20,426	22,063	54,121	60,895
Operating Segment [Member] | Japan [Member]
Segment Contribution [Abstract]
Operating income	18,245	16,287	49,292	46,216
Operating Segment [Member] | EMEA [Member]
Segment Contribution [Abstract]
Operating income	7,111	1,529	11,084	6,114
Operating Segment [Member] | Hong Kong/Taiwan [Member]
Segment Contribution [Abstract]
Operating income	9,048	8,063	22,825	24,754
Operating Segment [Member] | Manufacturing [Member]
Segment Contribution [Abstract]
Operating income	6,749	4,577	15,000	11,598
Operating Segment [Member] | Grow Tech [Member]
Segment Contribution [Abstract]
Operating income	(5,322)	(5,822)	(17,659)	(14,033)
Corporate and Other [Member]
Segment Contribution [Abstract]
Operating income	$ (88,039)	$ (63,069)	$ (235,978)	$ (199,401)