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v3.22.2.2

Basis of Presentation (Details) | Sep. 30, 2022
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Basis of Presentation [Abstract] |
Equity ownership in entities included in consolidated financial statements, minimum | 50.00%

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- Definition The minimum threshold percentage of equity ownership for domestic and international companies accounted for as a consolidated basis and included on the financial statements. + References No definition available. + Details
Name: | smp_MinimumEquityOwnershipPercentageThresholdForConsolidationInFinancialStatements
Namespace Prefix: | smp_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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