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SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
SEGMENT INFORMATION [Abstract]
Number of geographic regions	5nus_NumberOfGeographicRegions
Number of product lines	3nus_NumberOfProductLines
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 543,332us-gaap_SalesRevenueGoodsGross	$ 671,061us-gaap_SalesRevenueGoodsGross
North Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	172,066us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = nus_NorthAsiaMember	195,461us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = nus_NorthAsiaMember
Greater China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	187,367us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = nus_GreaterChinaMember	278,929us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = nus_GreaterChinaMember
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	79,872us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember	79,909us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
South Asia/Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	70,817us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember	71,194us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember
Europe - By Region [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	33,210us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember	45,568us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	63,289us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = country_JP	81,461us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = country_JP
Long-lived assets	15,549us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_JP		13,768us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_JP
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	108,777us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = country_KR	114,000us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = country_KR
Long-lived assets	50,405us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_KR		46,626us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_KR
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	58,988us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = country_US	54,822us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = country_US
Long-lived assets	274,555us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US		287,103us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_US
Mainland China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	134,197us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = country_CN	212,217us-gaap_SalesRevenueGoodsGross / us-gaap_StatementGeographicalAxis = country_CN
Long-lived assets	$ 118,973us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_CN		$ 103,445us-gaap_NoncurrentAssets / us-gaap_StatementGeographicalAxis = country_CN

X

- Definition

The number of geographic regions in which the Entity reports revenue.

+ References

No definition available.

+ Details

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X

- Definition

The number of product lines for which the entity reports revenue.

+ References

No definition available.

+ Details

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X

- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 41

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

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- Definition

Aggregate revenue during the period from sale of goods in the normal course of business, before deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a))

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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