Annual report pursuant to Section 13 and 15(d)

SUMMARY OF QUARTERLY OPERATIONS - UNAUDITED (Details)

v2.4.1.9
SUMMARY OF QUARTERLY OPERATIONS - UNAUDITED (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
0 Months Ended 3 Months Ended 12 Months Ended
Nov. 05, 2014
Aug. 06, 2014
May 07, 2014
Mar. 17, 2014
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
SUMMARY OF QUARTERLY OPERATIONS - UNAUDITED                              
Net sales revenue         $ 86,663us-gaap_SalesRevenueNet $ 93,406us-gaap_SalesRevenueNet $ 92,831us-gaap_SalesRevenueNet $ 93,467us-gaap_SalesRevenueNet $ 93,264us-gaap_SalesRevenueNet $ 90,405us-gaap_SalesRevenueNet $ 91,782us-gaap_SalesRevenueNet $ 94,375us-gaap_SalesRevenueNet $ 366,367us-gaap_SalesRevenueNet $ 369,826us-gaap_SalesRevenueNet $ 360,826us-gaap_SalesRevenueNet
Cost of sales         (23,468)us-gaap_CostOfGoodsAndServicesSold (22,742)us-gaap_CostOfGoodsAndServicesSold (22,793)us-gaap_CostOfGoodsAndServicesSold (22,581)us-gaap_CostOfGoodsAndServicesSold (23,611)us-gaap_CostOfGoodsAndServicesSold (22,917)us-gaap_CostOfGoodsAndServicesSold (22,075)us-gaap_CostOfGoodsAndServicesSold (23,741)us-gaap_CostOfGoodsAndServicesSold (91,584)us-gaap_CostOfGoodsAndServicesSold (92,344)us-gaap_CostOfGoodsAndServicesSold (91,369)us-gaap_CostOfGoodsAndServicesSold
Gross profit         63,195us-gaap_GrossProfit 70,664us-gaap_GrossProfit 70,038us-gaap_GrossProfit 70,886us-gaap_GrossProfit 69,653us-gaap_GrossProfit 67,488us-gaap_GrossProfit 69,707us-gaap_GrossProfit 70,634us-gaap_GrossProfit 274,783us-gaap_GrossProfit 277,482us-gaap_GrossProfit 269,457us-gaap_GrossProfit
Volume incentives         31,727natr_VolumeIncentives 34,918natr_VolumeIncentives 34,270natr_VolumeIncentives 34,893natr_VolumeIncentives 34,293natr_VolumeIncentives 33,203natr_VolumeIncentives 33,838natr_VolumeIncentives 34,182natr_VolumeIncentives 135,808natr_VolumeIncentives 135,516natr_VolumeIncentives 130,875natr_VolumeIncentives
Selling, general and administrative         30,634us-gaap_SellingGeneralAndAdministrativeExpense 30,200us-gaap_SellingGeneralAndAdministrativeExpense 29,941us-gaap_SellingGeneralAndAdministrativeExpense 29,152us-gaap_SellingGeneralAndAdministrativeExpense 33,020us-gaap_SellingGeneralAndAdministrativeExpense 27,773us-gaap_SellingGeneralAndAdministrativeExpense 28,068us-gaap_SellingGeneralAndAdministrativeExpense 29,522us-gaap_SellingGeneralAndAdministrativeExpense 119,927us-gaap_SellingGeneralAndAdministrativeExpense 118,383us-gaap_SellingGeneralAndAdministrativeExpense 104,716us-gaap_SellingGeneralAndAdministrativeExpense
Operating income         834us-gaap_OperatingIncomeLoss 5,546us-gaap_OperatingIncomeLoss 5,827us-gaap_OperatingIncomeLoss 6,841us-gaap_OperatingIncomeLoss 2,340us-gaap_OperatingIncomeLoss 6,512us-gaap_OperatingIncomeLoss 7,801us-gaap_OperatingIncomeLoss 6,930us-gaap_OperatingIncomeLoss 19,048us-gaap_OperatingIncomeLoss 23,583us-gaap_OperatingIncomeLoss 33,866us-gaap_OperatingIncomeLoss
Other income (expense)         349us-gaap_OtherNonoperatingIncomeExpense (42)us-gaap_OtherNonoperatingIncomeExpense (79)us-gaap_OtherNonoperatingIncomeExpense (262)us-gaap_OtherNonoperatingIncomeExpense 249us-gaap_OtherNonoperatingIncomeExpense (216)us-gaap_OtherNonoperatingIncomeExpense 1,522us-gaap_OtherNonoperatingIncomeExpense 438us-gaap_OtherNonoperatingIncomeExpense (34)us-gaap_OtherNonoperatingIncomeExpense 1,993us-gaap_OtherNonoperatingIncomeExpense 1,573us-gaap_OtherNonoperatingIncomeExpense
Income from continuing operations before provision for income taxes         1,183us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 5,504us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 5,748us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 6,579us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 2,589us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 6,296us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 9,323us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 7,368us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 19,014us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 25,576us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 35,439us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Provision (benefit) for income taxes         309us-gaap_IncomeTaxExpenseBenefit 407us-gaap_IncomeTaxExpenseBenefit 2,198us-gaap_IncomeTaxExpenseBenefit (3,657)us-gaap_IncomeTaxExpenseBenefit 776us-gaap_IncomeTaxExpenseBenefit 1,610us-gaap_IncomeTaxExpenseBenefit 3,235us-gaap_IncomeTaxExpenseBenefit 2,302us-gaap_IncomeTaxExpenseBenefit (743)us-gaap_IncomeTaxExpenseBenefit 7,923us-gaap_IncomeTaxExpenseBenefit 10,531us-gaap_IncomeTaxExpenseBenefit
Net income from continuing operations         874us-gaap_IncomeLossFromContinuingOperations 5,097us-gaap_IncomeLossFromContinuingOperations 3,550us-gaap_IncomeLossFromContinuingOperations 10,236us-gaap_IncomeLossFromContinuingOperations 1,813us-gaap_IncomeLossFromContinuingOperations 4,686us-gaap_IncomeLossFromContinuingOperations 6,088us-gaap_IncomeLossFromContinuingOperations 5,066us-gaap_IncomeLossFromContinuingOperations 19,757us-gaap_IncomeLossFromContinuingOperations 17,653us-gaap_IncomeLossFromContinuingOperations 24,908us-gaap_IncomeLossFromContinuingOperations
Loss from discontinued operations         (4,964)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (4,106)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (316)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (571)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity 30us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity 164us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (36)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (202)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (9,957)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity (44)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity 472us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net income         (4,090)us-gaap_ProfitLoss 991us-gaap_ProfitLoss 3,234us-gaap_ProfitLoss 9,665us-gaap_ProfitLoss 1,843us-gaap_ProfitLoss 4,850us-gaap_ProfitLoss 6,052us-gaap_ProfitLoss 4,864us-gaap_ProfitLoss 9,800us-gaap_ProfitLoss 17,609us-gaap_ProfitLoss 25,380us-gaap_ProfitLoss
Net loss attributable to noncontrolling interests         (193)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (26)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest             (219)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest    
Net income attributable to common shareholders         $ (3,897)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 1,017us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 3,234us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 9,665us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 1,843us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 4,850us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 6,052us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 4,864us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 10,019us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 17,609us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic $ 25,380us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Basic:                              
Net income from continuing operations (in dollars per share)         $ 0.05us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.30us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.22us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.63us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.11us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.29us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.38us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.32us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 1.15us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 1.10us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 1.59us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
Income (loss) from discontinued operations (in dollars per share)         $ (0.26)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare $ (0.24)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare $ (0.02)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare $ (0.03)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare   $ 0.01us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare   $ (0.01)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare $ (0.57)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare   $ 0.03us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare
Net Income (loss) per common share attributable to shareholders (in dollars per share)         $ (0.21)us-gaap_EarningsPerShareBasic $ 0.06us-gaap_EarningsPerShareBasic $ 0.20us-gaap_EarningsPerShareBasic $ 0.60us-gaap_EarningsPerShareBasic $ 0.11us-gaap_EarningsPerShareBasic $ 0.30us-gaap_EarningsPerShareBasic $ 0.38us-gaap_EarningsPerShareBasic $ 0.31us-gaap_EarningsPerShareBasic $ 0.58us-gaap_EarningsPerShareBasic $ 1.10us-gaap_EarningsPerShareBasic $ 1.62us-gaap_EarningsPerShareBasic
Diluted:                              
Net income from continuing operations (in dollars per share)         $ 0.05us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.29us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.22us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.61us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.11us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.28us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.38us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.31us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 1.12us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 1.08us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 1.56us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
Income (loss) from discontinued operations (in dollars per share)         $ (0.25)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare $ (0.23)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare $ (0.02)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare $ (0.03)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare   $ 0.01us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare   $ (0.01)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare $ (0.56)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare $ (0.01)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare $ 0.03us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare
Net Income (loss) per common share attributable to shareholders (in dollars per share)         $ (0.20)us-gaap_EarningsPerShareDiluted $ 0.06us-gaap_EarningsPerShareDiluted $ 0.20us-gaap_EarningsPerShareDiluted $ 0.58us-gaap_EarningsPerShareDiluted $ 0.11us-gaap_EarningsPerShareDiluted $ 0.29us-gaap_EarningsPerShareDiluted $ 0.38us-gaap_EarningsPerShareDiluted $ 0.30us-gaap_EarningsPerShareDiluted $ 0.56us-gaap_EarningsPerShareDiluted $ 1.07us-gaap_EarningsPerShareDiluted $ 1.59us-gaap_EarningsPerShareDiluted
Dividends declared per common share (in dollars per share) $ 0.10us-gaap_CommonStockDividendsPerShareDeclared $ 0.10us-gaap_CommonStockDividendsPerShareDeclared $ 0.10us-gaap_CommonStockDividendsPerShareDeclared $ 0.10us-gaap_CommonStockDividendsPerShareDeclared $ 0.10us-gaap_CommonStockDividendsPerShareDeclared $ 1.60us-gaap_CommonStockDividendsPerShareDeclared $ 0.10us-gaap_CommonStockDividendsPerShareDeclared $ 0.10us-gaap_CommonStockDividendsPerShareDeclared $ 0.10us-gaap_CommonStockDividendsPerShareDeclared $ 1.60us-gaap_CommonStockDividendsPerShareDeclared $ 0.10us-gaap_CommonStockDividendsPerShareDeclared $ 0.10us-gaap_CommonStockDividendsPerShareDeclared $ 1.90us-gaap_CommonStockDividendsPerShareDeclared $ 1.90us-gaap_CommonStockDividendsPerShareDeclared $ 0.15us-gaap_CommonStockDividendsPerShareDeclared