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NATURE OF OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (Details 7) (USD $)
In Thousands, except Per Share data, unless otherwise specified
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0 Months Ended |
12 Months Ended |
0 Months Ended |
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Dec. 01, 2014
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Sep. 19, 2014
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Aug. 29, 2014
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Jun. 26, 2014
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Jun. 02, 2014
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Apr. 07, 2014
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Aug. 25, 2014
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| Strategic Alliance and Formation of China Joint Venture [Line Items] |
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| Payments of Dividends |
$ 1,871us-gaap_PaymentsOfDividends
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$ 28,501us-gaap_PaymentsOfDividends
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$ 1,619us-gaap_PaymentsOfDividends
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$ 1,619us-gaap_PaymentsOfDividends
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$ 1,618us-gaap_PaymentsOfDividends
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$ 35,228us-gaap_PaymentsOfDividends
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$ 30,419us-gaap_PaymentsOfDividends
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$ 2,349us-gaap_PaymentsOfDividends
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| Premium to Entity Average Stock Price for the Trailing Thirty Day Period |
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10.00%natr_PremiumToEntityAverageStockPriceForTrailingThirtyDayPeriod
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| Fosun Pharma [Member] |
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| Strategic Alliance and Formation of China Joint Venture [Line Items] |
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| Shares, Issued |
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2,855us-gaap_SharesIssued
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= natr_FosunPharmaMember
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| Share Price |
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$ 16.19us-gaap_SharePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= natr_FosunPharmaMember
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| Period of Time to Measure Premium of Entity Common Stock |
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30 days
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| Related Party Ownership Percentage After Common Stock Purchase |
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15.00%natr_RelatedPartyOwnershipPercentageAfterCommonStockPurchase
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= natr_FosunPharmaMember
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| Common Stock |
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| Strategic Alliance and Formation of China Joint Venture [Line Items] |
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| Dividends Payable, Amount Per Share |
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$ 1.50us-gaap_DividendsPayableAmountPerShare
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
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| Dividends payable to shareholders |
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28,501natr_DividendsPayableToShareholders
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
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| Common Stock | Fosun Pharma [Member] |
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| Strategic Alliance and Formation of China Joint Venture [Line Items] |
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| Proceeds from Issuance of Private Placement |
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44,795us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= natr_FosunPharmaMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
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| China Joint Venture [Member] |
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| Strategic Alliance and Formation of China Joint Venture [Line Items] |
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| Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions |
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80.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
/ dei_LegalEntityAxis
= natr_ChinaJointVentureMember
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| Initial Capitalization Amount |
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20,000natr_InitialCapitalizationAmount
/ dei_LegalEntityAxis
= natr_ChinaJointVentureMember
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| China Joint Venture [Member] | Fosun Pharma [Member] |
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| Strategic Alliance and Formation of China Joint Venture [Line Items] |
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| Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions |
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20.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
/ dei_LegalEntityAxis
= natr_ChinaJointVentureMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= natr_FosunPharmaMember
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| Initial Capitalization Amount |
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$ 16,000natr_InitialCapitalizationAmount
/ dei_LegalEntityAxis
= natr_ChinaJointVentureMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= natr_FosunPharmaMember
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| Number of Board of Directors Initially Appointed |
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1natr_NumberOfBoardOfDirectorsInitiallyAppointed
/ dei_LegalEntityAxis
= natr_ChinaJointVentureMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= natr_FosunPharmaMember
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