The estimated increase (or decrease) for the maximum amount of possible loss from the contingency during the period.

No definition available.

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The estimated increase (or decrease) for the minimum amount of possible loss from the contingency during the period.

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No definition available.

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Refers to number of key officers, with whom control arrangements entered into by the entity.

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Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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Number of pending claims pertaining to a loss contingency.

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The estimated maximum amount of possible loss from the contingency.

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The estimated minimum amount of possible loss from the contingency.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties.

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Represents the aggregate increase in the liability for accruals related to standard and extended product warranties issued during the reporting period.

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The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers.

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Commitments and Contingencies (Details) (USD $)	3 Months Ended	12 Months Ended
Commitments and Contingencies (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2014 Officer	Dec. 31, 2013	Dec. 31, 2012
Loss Contingencies [Line Items]
Total rent expense		$ 10,107,000us-gaap_LeaseAndRentalExpense	$ 10,324,000us-gaap_LeaseAndRentalExpense	$ 10,695,000us-gaap_LeaseAndRentalExpense
Future minimum rental payments under operating leases [Abstract]
2015		7,629,000
2016		6,235,000
2017		4,008,000
2018		2,293,000
2019		865,000
Thereafter		1,356,000
Total		22,386,000
Warranty expense		84,500,000us-gaap_ProductWarrantyExpense	78,100,000us-gaap_ProductWarrantyExpense	76,500,000us-gaap_ProductWarrantyExpense
Changes in product warranties [Roll forward]
Balance, beginning of period		18,041,000us-gaap_ProductWarrantyAccrual	17,288,000us-gaap_ProductWarrantyAccrual
Liabilities accrued for current year sales		84,480,000	78,058,000
Settlement of warranty claims		(83,193,000)us-gaap_ProductWarrantyAccrualPayments	(77,305,000)us-gaap_ProductWarrantyAccrualPayments
Balance, end of period		19,328,000us-gaap_ProductWarrantyAccrual	18,041,000us-gaap_ProductWarrantyAccrual	17,288,000us-gaap_ProductWarrantyAccrual
Number of key officers		2smp_NumberOfKeyOfficers
Payment for settled claims	10,600,000us-gaap_PaymentsForLegalSettlements
Financial Standby Letter of Credit [Member]
Changes in product warranties [Roll forward]
Outstanding letters of credit with certain vendors		4,500,000
Real Estate [Member]
Loss Contingencies [Line Items]
Total rent expense		7,760,000	7,841,000	7,829,000
Other [Member]
Loss Contingencies [Line Items]
Total rent expense		2,347,000	2,483,000	2,866,000
Asbestos [Member]
Changes in product warranties [Roll forward]
Pending claims, approximate number		2,125
Payment for settled claims		17,600,000
Increase for low end of range		11,700,000
Increase for high end of range		18,000,000
Incremental pre-tax provision		12,800,000
Range of possible loss, minimum		43,000,000
Range of possible loss, maximum		76,400,000
Asbestos [Member] \| Minimum [Member]
Changes in product warranties [Roll forward]
Estimated legal costs		36,100,000
Asbestos [Member] \| Maximum [Member]
Changes in product warranties [Roll forward]
Estimated legal costs		$ 55,400,000