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CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
CONSOLIDATED STATEMENTS OF OPERATIONS |  |  |
Net sales revenue, rebate portion of volume incentives | $ 43,121 | $ 44,628 | $ 44,099

X
- 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