XML 20 R42.htm IDEA: XBRL DOCUMENT v2.4.1.9
Credit Facilities and Long-Term Debt, Canadian Revolving Credit Facility (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Line of Credit Facility [Line Items]  
Maximum borrowing capacity $ 250us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Expiration date Mar. 31, 2018
GE Canada Finance Holding Company Credit Facility [Member]  
Line of Credit Facility [Line Items]  
Maximum borrowing capacity 10us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= smp_GeCanadaFinanceHoldingCompanyCreditFacilityMember
Outstanding borrowings under credit facility 0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_CreditFacilityAxis
= smp_GeCanadaFinanceHoldingCompanyCreditFacilityMember
Line of Credit [Member]  
Line of Credit Facility [Line Items]  
Maximum borrowing capacity $ 10us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember