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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS |  |  |  |
Net sales revenue, rebate portion of volume incentives | $ 10,460 | $ 10,877 | $ 32,746 | $ 33,815

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- Definition This element represents the rebate portion of volume incentives that are deducted from net sales revenue, during the period by the entity. + References No definition available. + Details
Name: | natr_RebatePortionOfVolumeIncentives
Namespace Prefix: | natr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_IncomeStatementAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration