XML 60 R42.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Sale of Receivables (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Sale of Receivables [Abstract] |  |  |  |
Sale of receivables to financial institutions | $ 193.8 | $ 198.1 | $ 528.1 | $ 508.6
Charge related to sale of receivables | $ 3.9 | $ 4.3 | $ 11.0 | $ 10.5

X
- Definition The amount of receivables sold during the period. + References No definition available. + Details
Name: | smp_SaleOfReceivables
Namespace Prefix: | smp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of charges incurred relating to the sale of receivables during the reporting period. + References No definition available. + Details
Name: | smp_SaleOfReceivablesRelatedCharges
Namespace Prefix: | smp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration