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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 30, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Segment Reporting [Abstract] |  |  |  |  |  |  |  |  |  |  |
Number of geographic regions |  |  |  |  |  |  |  |  | 5 |  |
Revenue by region [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 2,169,664 | $ 1,743,991 | $ 1,537,259
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue | 588,300 | 526,200 | 593,200 | 462,000 | 495,300 | 428,400 | 424,400 | 395,800 | 2,169,664 | 1,743,991 | 1,537,259
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue | 588,300 | 526,200 | 593,200 | 462,000 | 495,300 | 428,400 | 424,400 | 395,800 | 2,169,664 | 1,743,991 | 1,537,259
Nu Skin [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 1,178,414 | 964,130 | 913,819
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 1,178,414 | 964,130 | 913,819
Pharmanex [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 983,778 | 770,192 | 612,209
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 983,778 | 770,192 | 612,209
Other Product Lines [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 7,472 | 9,669 | 11,231
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 7,472 | 9,669 | 11,231
Japan [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 497,298 | 472,519 | 471,425
Long-lived assets | 8,441 |  |  |  | 14,113 |  |  |  | 8,441 | 14,113 |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 497,298 | 472,519 | 471,425
South Korea [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 297,535 | 278,646 | 214,648
Long-lived assets | 14,030 |  |  |  | 11,451 |  |  |  | 14,030 | 11,451 |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 297,535 | 278,646 | 214,648
United States [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 230,924 | 211,788 | 212,070
Long-lived assets | 163,137 |  |  |  | 98,205 |  |  |  | 163,137 | 98,205 |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 230,924 | 211,788 | 212,070
Hong Kong [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 169,728 | 80,524 | 69,686
Long-lived assets | 559 |  |  |  | 1,030 |  |  |  | 559 | 1,030 |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 169,728 | 80,524 | 69,686
Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 162,055 | 140,497 | 124,497
Long-lived assets | 2,622 |  |  |  | 1,966 |  |  |  | 2,622 | 1,966 |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 162,055 | 140,497 | 124,497
Mainland China [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 264,791 | 152,538 | 91,352
Long-lived assets | 30,199 |  |  |  | 15,135 |  |  |  | 30,199 | 15,135 |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 264,791 | 152,538 | 91,352
Taiwan [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 136,121 | 108,857 | 107,133
Long-lived assets | 1,945 |  |  |  | 1,556 |  |  |  | 1,945 | 1,556 |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 136,121 | 108,857 | 107,133
North Asia [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue by region [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 794,833 | 751,165 | 686,073
Greater China [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue by region [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 570,640 | 341,919 | 268,171
Americas [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue by region [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 288,732 | 251,984 | 250,008
South Asia Pacific [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue by region [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 330,240 | 236,212 | 182,796
Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue by region [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | $ 185,219 | $ 162,711 | $ 150,211

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