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Allowance for Doubtful Accounts - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2014 USD ($)
Polymers [Member] |
Accounts Notes And Loans Receivable [Line Items] |
Increased allowance for doubtful accounts | $ 3,425,000

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

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- Definition Amount of increase (decrease) in the allowance for doubtful accounts. + References No definition available. + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=scl_PolymersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |