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Accounts Receivable Securitization (Details) - USD ($) $ in Millions | 1 Months Ended |
--- | --- | ---
Oct. 31, 2016 | Dec. 31, 2016
Accounts Receivable Securitization [Abstract] |  |
Accounts receivable securitization program | $ 60.6 | $ 58.7
Proceeds from accounts receivable securitization program | 40.0 |
Fair value of the deferred purchase price receivable | $ 20.6 | $ 18.7

X
- Definition Accounts receivable sold via securitization program. + References No definition available. + Details
Name: | sxt_AccountsReceivableSoldViaSecuritizationProgram
Namespace Prefix: | sxt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of fair value of the deferred purchase price receivable. + References No definition available. + Details
Name: | sxt_FairValueOfDeferredPurchasePriceReceivable
Namespace Prefix: | sxt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of proceeds owed to the reporting entity by a third party for the sale of trade receivables. + References No definition available. + Details
Name: | sxt_ProceedsReceivedByTheCompanyForTheSaleOfTradeReceivablesFromAThirdParty
Namespace Prefix: | sxt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TransfersAndServicingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration