Name:	sxt_AutomaticEnrollmentAnnualIncreaseRate
Namespace Prefix:	sxt_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

The age at which participants become eligible for contributions under employee benefit plan.

No definition available.

Name:	sxt_EmployeeBenefitPlanEmployerContributionParticipantsAge
Namespace Prefix:	sxt_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

Number of days after retirement or termination during which a participant loan must be repaid in full to avoid treatment as taxable income.

No definition available.

Name:	sxt_EmployeeBenefitPlanParticipantLoanRepaymentGracePeriodAfterRetirementOrTermination
Namespace Prefix:	sxt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Repayment period for participant loans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

Name:	sxt_EmployeeBenefitPlanParticipantLoanRepaymentTerm
Namespace Prefix:	sxt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Interest rate on participant loans outstanding.

No definition available.

Name:	sxt_EmployeeBenefitPlanParticipantLoansInterestRate
Namespace Prefix:	sxt_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	instant

Participants vested account balance threshold value to determines that the participant may elect to receive a lump-sum distribution or a direct rollover to an individual retirement account, which will be established by the Company for the participant upon separation from service due to retirement or termination.

No definition available.

Name:	sxt_EmployeeBenefitPlanParticipantsVestedAccountBalanceThresholdAmountToElectModeOfBenefitDistributionOption
Namespace Prefix:	sxt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Participants vested account balance threshold value to determines that the participant will automatically receive a lump-sum distribution equal to his or her vested account balance upon separation from service due to retirement or termination.

No definition available.

Name:	sxt_EmployeeBenefitPlanParticipantsVestedAccountBalanceThresholdAmountToReceiveEqualVestedBalance
Namespace Prefix:	sxt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Participants vested account balance threshold value to determines that the participant may receive his or her benefits in a lump-sum cash payment, lump-sum rollover into an individual retirement account or another employer’s eligible retirement plan or defer receiving benefits until a future date upon separation from service due to retirement or termination.

No definition available.

Name:	sxt_EmployeeBenefitPlanParticipantsVestedAccountBalanceThresholdAmountToReceiveLumpsumCashPayment
Namespace Prefix:	sxt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of revenue balance under revenue credit program account.

No definition available.

Name:	sxt_EmployeeBenefitPlanRevenueCreditAccountBalance
Namespace Prefix:	sxt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Dividends earned during the period on revenue credit account.

No definition available.

Name:	sxt_EmployeeBenefitPlanRevenueCreditAccountDividendIncome
Namespace Prefix:	sxt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of revenue credits received.

No definition available.

Name:	sxt_EmployeeBenefitPlanRevenueCreditsReceived
Namespace Prefix:	sxt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The vesting percentage of employee contributions.

No definition available.

Name:	sxt_EmployeeContributionsVestingPercentage
Namespace Prefix:	sxt_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

The vesting percentage of employer contributions.

No definition available.

Name:	sxt_EmployerContributionsVestingPercentage
Namespace Prefix:	sxt_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration

Interest rate on debt of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-02)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 235
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479143/962-235-S50-1

Name:	us-gaap-ebp_EmployeeBenefitPlanDebtInterestRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-SubTopic 205
-Topic 962
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantContributionPretaxMaximumAnnualCompensationToTotalCompensationPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Name:	dei_LegalEntityAxis=sxt_EBP006Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestAxis=us-gaap-ebp_EmployeeBenefitPlanTrusteeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: