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Goodwill and Other Intangible Assets (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Goodwill and indefinite life intangible assets: |  |  |
Goodwill | $ 112,446,000 us-gaap_Goodwill | $ 112,446,000 us-gaap_Goodwill |
Trademarks and trade names | 24,599,000 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill | 24,599,000 us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill |
Total goodwill and trademarks and trade names | 137,045,000 nus_TotalGoodwillAndTrademarksAndTradeNames | 137,045,000 nus_TotalGoodwillAndTrademarksAndTradeNames |
Finite life intangible assets [Abstract] |  |  |
Gross carrying amount | 139,990,000 us-gaap_FiniteLivedIntangibleAssetsGross | 148,206,000 us-gaap_FiniteLivedIntangibleAssetsGross |
Accumulated amortization | 89,527,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization | 89,637,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization |
Weighted average | 15 years |  |
Amortization expense | 8,400,000 us-gaap_AmortizationOfIntangibleAssets | 7,800,000 us-gaap_AmortizationOfIntangibleAssets | 7,900,000 us-gaap_AmortizationOfIntangibleAssets
Annual estimated amortization expense [Abstract] |  |  |
2013 | 8,000,000 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths |  |
2014 | 8,000,000 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo |  |
2015 | 8,000,000 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree |  |
2016 | 8,000,000 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour |  |
2017 | 8,000,000 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive |  |
Scanner technology [Member] |  |  |
Finite life intangible assets [Abstract] |  |  |
Gross carrying amount | 46,482,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = nus_ScannerTechnologyMember | 46,482,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = nus_ScannerTechnologyMember |
Accumulated amortization | 30,557,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = nus_ScannerTechnologyMember | 27,533,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = nus_ScannerTechnologyMember |
Weighted average | 18 years |  |
Developed technology [Member] |  |  |
Finite life intangible assets [Abstract] |  |  |
Gross carrying amount | 22,500,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember | 22,500,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember |
Accumulated amortization | 16,734,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember | 15,909,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember |
Weighted average | 20 years |  |
Distribution network [Member] |  |  |
Finite life intangible assets [Abstract] |  |  |
Gross carrying amount | 11,598,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DistributionRightsMember | 11,598,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DistributionRightsMember |
Accumulated amortization | 10,594,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DistributionRightsMember | 10,093,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DistributionRightsMember |
Weighted average | 15 years |  |
Trademarks [Member] |  |  |
Finite life intangible assets [Abstract] |  |  |
Gross carrying amount | 14,404,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember | 14,086,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember |
Accumulated amortization | 12,461,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember | 11,660,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksMember |
Weighted average | 15 years |  |
Other [Member] |  |  |
Finite life intangible assets [Abstract] |  |  |
Gross carrying amount | 45,006,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = nus_OtherFiniteLifeIntangibleAssetsMember | 53,540,000 us-gaap_FiniteLivedIntangibleAssetsGross / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = nus_OtherFiniteLifeIntangibleAssetsMember |
Accumulated amortization | $ 19,181,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = nus_OtherFiniteLifeIntangibleAssetsMember | $ 24,442,000 us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = nus_OtherFiniteLifeIntangibleAssetsMember |
Weighted average | 8 years |  |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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