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CAPITAL TRANSACTIONS (Details) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified
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0 Months Ended |
3 Months Ended |
12 Months Ended |
1 Months Ended |
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Dec. 01, 2014
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Nov. 05, 2014
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Sep. 19, 2014
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Aug. 29, 2014
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Aug. 27, 2014
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Aug. 06, 2014
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Jun. 02, 2014
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May 07, 2014
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Apr. 07, 2014
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Mar. 17, 2014
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Dec. 31, 2014
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Sep. 30, 2014
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Jun. 30, 2014
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Mar. 31, 2014
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Dec. 31, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Aug. 31, 2013
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Nov. 30, 2014
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| Dividends |
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| Cash dividend per common share (in dollars per share) |
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$ 0.10us-gaap_CommonStockDividendsPerShareDeclared
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$ 0.10us-gaap_CommonStockDividendsPerShareDeclared
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$ 0.10us-gaap_CommonStockDividendsPerShareDeclared
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$ 0.10us-gaap_CommonStockDividendsPerShareDeclared
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$ 0.10us-gaap_CommonStockDividendsPerShareDeclared
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$ 1.60us-gaap_CommonStockDividendsPerShareDeclared
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$ 0.10us-gaap_CommonStockDividendsPerShareDeclared
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$ 0.10us-gaap_CommonStockDividendsPerShareDeclared
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$ 0.10us-gaap_CommonStockDividendsPerShareDeclared
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$ 1.60us-gaap_CommonStockDividendsPerShareDeclared
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$ 0.10us-gaap_CommonStockDividendsPerShareDeclared
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$ 0.10us-gaap_CommonStockDividendsPerShareDeclared
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$ 1.90us-gaap_CommonStockDividendsPerShareDeclared
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$ 1.90us-gaap_CommonStockDividendsPerShareDeclared
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$ 0.15us-gaap_CommonStockDividendsPerShareDeclared
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| Dividend paid |
$ 1,871,000us-gaap_PaymentsOfDividends
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$ 28,501,000us-gaap_PaymentsOfDividends
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$ 1,619,000us-gaap_PaymentsOfDividends
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$ 1,619,000us-gaap_PaymentsOfDividends
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$ 1,618,000us-gaap_PaymentsOfDividends
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$ 35,228,000us-gaap_PaymentsOfDividends
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$ 30,419,000us-gaap_PaymentsOfDividends
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$ 2,349,000us-gaap_PaymentsOfDividends
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| Special one-time cash dividend per common share (in dollars per share) |
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$ 1.50natr_SpecialOneTimeCommonStockDividendsPerShareDeclared
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| Share Repurchase Program |
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| Repurchase of common stock (in shares) |
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319us-gaap_StockRepurchasedDuringPeriodShares
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177us-gaap_StockRepurchasedDuringPeriodShares
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496us-gaap_StockRepurchasedDuringPeriodShares
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| Average Price Paid per Share (in dollars per share) |
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$ 14.80us-gaap_TreasuryStockAcquiredAverageCostPerShare
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$ 15.49us-gaap_TreasuryStockAcquiredAverageCostPerShare
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$ 15.03us-gaap_TreasuryStockAcquiredAverageCostPerShare
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| Program Balance Used for Repurchases |
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4,724,000us-gaap_StockRepurchasedDuringPeriodValue
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2,731,000us-gaap_StockRepurchasedDuringPeriodValue
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7,455,000us-gaap_StockRepurchasedDuringPeriodValue
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2,546,000us-gaap_StockRepurchasedDuringPeriodValue
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| 2013 Share Repurchase Program 2013 |
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| Share Repurchase Program |
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| Stock repurchase program, authorized amount |
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10,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount
/ us-gaap_ShareRepurchaseProgramAxis
= natr_ShareRepurchaseProgram2013Member
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| 2014 Share Repurchase Program 2014 |
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| Share Repurchase Program |
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| Stock repurchase program, authorized amount |
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20,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount
/ us-gaap_ShareRepurchaseProgramAxis
= natr_ShareRepurchaseProgram2014Member
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| Remaining balance available for repurchases |
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$ 20,000,000us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount
/ us-gaap_ShareRepurchaseProgramAxis
= natr_ShareRepurchaseProgram2014Member
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