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INCOME TAXES (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Currently payable [Abstract]      
Federal $ 18,642,000us-gaap_CurrentFederalTaxExpenseBenefit $ 21,252,000us-gaap_CurrentFederalTaxExpenseBenefit $ 22,394,000us-gaap_CurrentFederalTaxExpenseBenefit
State 2,264,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit 3,065,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit 3,024,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign 25,435,000us-gaap_CurrentForeignTaxExpenseBenefit 25,175,000us-gaap_CurrentForeignTaxExpenseBenefit 22,670,000us-gaap_CurrentForeignTaxExpenseBenefit
Current income tax (expense), total 46,341,000us-gaap_CurrentIncomeTaxExpenseBenefit 49,492,000us-gaap_CurrentIncomeTaxExpenseBenefit 48,088,000us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred (benefit) expense [Abstract]      
Federal 1,532,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit (5,125,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit 170,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State (935,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 502,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 603,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign (14,111,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit (1,534,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit 2,035,000us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Deferred income tax (expense), total (13,514,000)us-gaap_DeferredIncomeTaxExpenseBenefit (6,157,000)us-gaap_DeferredIncomeTaxExpenseBenefit 2,808,000us-gaap_DeferredIncomeTaxExpenseBenefit
Income taxes 32,827,000us-gaap_IncomeTaxExpenseBenefit 43,335,000us-gaap_IncomeTaxExpenseBenefit 50,896,000us-gaap_IncomeTaxExpenseBenefit
Deferred tax assets [Abstract]      
Benefit plans 15,507,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation 21,148,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation  
Liabilities and reserves 19,384,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals 11,499,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals  
Operating loss and credit carryovers 57,128,000us-gaap_DeferredTaxAssetsOtherTaxCarryforwards 51,292,000us-gaap_DeferredTaxAssetsOtherTaxCarryforwards  
Other 6,872,000us-gaap_DeferredTaxAssetsOther 17,151,000us-gaap_DeferredTaxAssetsOther  
Gross deferred tax assets 98,891,000us-gaap_DeferredTaxAssetsGross 101,090,000us-gaap_DeferredTaxAssetsGross  
Valuation allowance (43,055,000)us-gaap_DeferredTaxAssetsValuationAllowance (43,048,000)us-gaap_DeferredTaxAssetsValuationAllowance  
Deferred tax assets 55,836,000us-gaap_DeferredTaxAssetsNet 58,042,000us-gaap_DeferredTaxAssetsNet  
Deferred tax liabilities [Abstract]      
Property, plant and equipment (1,619,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment (21,139,000)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment  
Other assets (1,462,000)us-gaap_DeferredTaxLiabilitiesOtherFiniteLivedAssets (1,411,000)us-gaap_DeferredTaxLiabilitiesOtherFiniteLivedAssets  
Goodwill (28,583,000)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill (28,573,000)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill  
Other (1,426,000)us-gaap_DeferredTaxLiabilitiesOther (3,168,000)us-gaap_DeferredTaxLiabilitiesOther  
Deferred tax liabilities (33,090,000)us-gaap_DeferredTaxLiabilities (54,291,000)us-gaap_DeferredTaxLiabilities  
Net deferred tax assets, noncurrent 1,000,000us-gaap_DeferredTaxAssetsGrossNoncurrent    
Increase in Net Deferred Tax Assets     10,800,000sxt_IncreaseInNetDeferredTaxAssets
Increase in Other Current Assets     6,000,000sxt_IncreaseInOtherCurrentAssets
Increase in Other Comprehensive Income     16,800,000sxt_IncreaseInOtherComprehensiveIncome
Net deferred tax assets 22,746,000us-gaap_DeferredTaxAssetsLiabilitiesNet 3,751,000us-gaap_DeferredTaxAssetsLiabilitiesNet  
Effective tax rate reconciliation [Abstract]      
Taxes at statutory rate (in hundredths) 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State income taxes, net of federal income tax benefit (in hundredths) 1.90%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 1.50%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Tax credits (in hundredths) (0.40%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits (0.30%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits 0.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits
Taxes on foreign earnings (in hundredths) (4.70%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (5.30%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential (4.10%)us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
Resolution of prior years' tax matters (in hundredths) (0.60%)us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes (0.70%)us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes (1.40%)us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes
U.S. manufacturing deduction (in hundredths) (2.00%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther (1.60%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther (1.80%)us-gaap_EffectiveIncomeTaxRateReconciliationDeductionsOther
Valuation allowance adjustments (in hundredths) 0.20%us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance (0.80%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance (0.50%)us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance
Other, net (in hundredths) (0.80%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.10%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.20%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective tax rate (in hundredths) 28.60%us-gaap_EffectiveIncomeTaxRateContinuingOperations 27.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations 28.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Earnings from continuing operations before income taxes [Abstract]      
United States 56,211,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic 55,461,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic 79,118,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign 58,387,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 102,172,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign 96,860,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Total 114,598,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 157,633,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 175,978,000us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Unremitted earnings of foreign subsidiaries 449,800,000sxt_UnremittedEarningsOfForeignSubsidiaries    
Reconciliation of change in liability for unrecognized tax benefits [Roll Forward]      
Balance at beginning of year 5,295,000us-gaap_UnrecognizedTaxBenefits 7,091,000us-gaap_UnrecognizedTaxBenefits  
Increases for tax positions taken in the current year 718,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 818,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions  
Increases for tax positions taken in prior years 10,238,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 875,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions  
Decreases related to settlements with tax authorities (1,044,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities (3,113,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities  
Decreases as a result of lapse of the applicable statutes of limitations (751,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations (374,000)us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations  
Foreign currency exchange rate changes (516,000)sxt_UnrecognizedTaxBenefitsReductionsResultingFromForeignCurrencyExchangeRateChanges (2,000)sxt_UnrecognizedTaxBenefitsReductionsResultingFromForeignCurrencyExchangeRateChanges  
Balance at the end of year 13,940,000us-gaap_UnrecognizedTaxBenefits 5,295,000us-gaap_UnrecognizedTaxBenefits 7,091,000us-gaap_UnrecognizedTaxBenefits
Unrecognized tax benefits that would impact the effective tax rate, if recognized 4,300,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate    
Income tax interest and penalties accrued 500,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued 700,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued  
Expected decrease in liability for unrecognized tax benefits in the next fiscal year 10,200,000us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit    
Unrecognized tax benefits that would impact the effective tax rate in the next fiscal year 300,000sxt_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRateInNextFiscalYear    
Foreign Country [Member]      
Operating Loss Carryforwards [Line Items]      
Operating loss carryovers 116,200,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		    
Operating loss carryovers, subject to expiration 10,100,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		    
Operating loss carryovers, not subject to expiration 106,000,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		    
State and Local Jurisdiction [Member]      
Operating Loss Carryforwards [Line Items]      
Operating loss carryovers 99,300,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		    
Operating loss carryovers, subject to expiration $ 99,300,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember