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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales revenue, rebate portion of volume incentives	$ 11,591	$ 11,582

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

X

- Details

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