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CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified | Common Stock | Retained Earnings | Noncontrolling Interest | Accumulated Other Comprehensive Income (Loss) | Total
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Balance at Dec. 31, 2011 | $ 71,628us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 25,879us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | $ (10,069)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 87,438us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance (in shares) at Dec. 31, 2011 | 15,569us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |
Share-based compensation expense | 2,878us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 2,878us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross
Tax benefit from exercise of stock options | 378us-gaap_DeferredTaxExpenseFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 378us-gaap_DeferredTaxExpenseFromStockOptionsExercised
Proceeds from the exercise of stock options | 2,408us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 2,408us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Proceeds from the exercise of stock options (in shares) | 241us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Cash dividends (0.15, 1.90 and 1.90 per share for 2012, 2013 and 2014, respectively) |  | (2,349)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | (2,349)us-gaap_DividendsCommonStockCash
Net income |  | 25,380us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | 25,380us-gaap_ProfitLoss
Other comprehensive income (loss) |  |  |  | (497)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (497)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Balance at Dec. 31, 2012 | 77,292us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 48,910us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | (10,566)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 115,636us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance (in shares) at Dec. 31, 2012 | 15,810us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |
Share-based compensation expense | 3,389us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 3,389us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross
Tax benefit from exercise of stock options | 653us-gaap_DeferredTaxExpenseFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 653us-gaap_DeferredTaxExpenseFromStockOptionsExercised
Proceeds from the exercise of stock options | 4,334us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 4,334us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Proceeds from the exercise of stock options (in shares) | 509us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Repurchase of common stock | (2,546)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | (2,546)us-gaap_StockRepurchasedDuringPeriodValue
Repurchase of common stock (in shares) | (140)us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Cash dividends (0.15, 1.90 and 1.90 per share for 2012, 2013 and 2014, respectively) |  | (30,419)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | (30,419)us-gaap_DividendsCommonStockCash
Net income |  | 17,609us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | 17,609us-gaap_ProfitLoss
Other comprehensive income (loss) |  |  |  | (3,397)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | (3,397)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Balance at Dec. 31, 2013 | 83,122us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 36,100us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  | (13,963)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 105,259us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance (in shares) at Dec. 31, 2013 | 16,179us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 16,179us-gaap_CommonStockSharesIssued
Increase (Decrease) in Shareholders' Equity |  |  |  |  |
Share-based compensation expense | 3,948us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 3,948us-gaap_StockIssuedDuringPeriodValueShareBasedCompensationGross
Net proceeds from the issuance of shares to noncontrolling interests | 44,795us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 44,795us-gaap_StockIssuedDuringPeriodValueNewIssues
Net proceeds from the issuance of shares to noncontrolling interests (in shares) | 2,855us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Tax benefit from exercise of stock options | 307us-gaap_DeferredTaxExpenseFromStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 307us-gaap_DeferredTaxExpenseFromStockOptionsExercised
Proceeds from the exercise of stock options | 772us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 772us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised
Proceeds from the exercise of stock options (in shares) | 124us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Repurchase of common stock | (7,455)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | (7,455)us-gaap_StockRepurchasedDuringPeriodValue
Repurchase of common stock (in shares) | (496)us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | (496)us-gaap_StockRepurchasedDuringPeriodShares
Cash dividends (0.15, 1.90 and 1.90 per share for 2012, 2013 and 2014, respectively) |  | (35,228)us-gaap_DividendsCommonStockCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |  | (35,228)us-gaap_DividendsCommonStockCash
Net income |  | 10,019us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (219)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  | 9,800us-gaap_ProfitLoss
Noncontrolling interests investment in Nature's Sunshine Hong Kong Limited |  |  | 4,000us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  | 4,000us-gaap_NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest
Other comprehensive income (loss) |  |  |  | 2,759us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | 2,759us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Balance at Dec. 31, 2014 | $ 125,489us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 10,891us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 3,781us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | $ (11,204)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember | $ 128,957us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
Balance (in shares) at Dec. 31, 2014 | 18,662us-gaap_CommonStockSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  | 18,662us-gaap_CommonStockSharesIssued

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