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Segment Information, Segment Contribution (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | $ 69,892 | $ 80,675 | $ 212,747 | $ 222,429
Other income (expense) | (4,979) | (6,982) | (11,153) | (16,940)
Income before provision for income taxes | 64,913 | 73,693 | 201,594 | 205,489
Mainland China [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | 48,619 | 71,185 | 158,873 | 189,901
Americas/Pacific [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | 12,875 | 11,848 | 41,314 | 38,088
South Korea [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | 24,770 | 24,754 | 76,417 | 75,836
Southeast Asia [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | 22,063 | 21,204 | 60,895 | 58,245
Japan [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | 16,287 | 15,162 | 46,216 | 41,777
Hong Kong/Taiwan [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | 8,063 | 8,100 | 24,754 | 23,781
EMEA [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | 1,529 | 2,614 | 6,114 | 10,438
Nu Skin [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | 134,206 | 154,867 | 414,583 | 438,066
Operating Segment [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | 132,961 | 154,180 | 412,148 | 436,056
Corporate and Other [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | (63,069) | (73,505) | (199,401) | (213,627)
Manufacturing [Member] | Operating Segment [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | 4,577 | 2,045 | 11,598 | 4,039
Grow Tech [Member] | Operating Segment [Member] |  |  |  |
Segment Contribution [Abstract] |  |  |  |
Operating income (loss) | $ (5,822) | $ (2,732) | $ (14,033) | $ (6,049)

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