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Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 segment	Mar. 31, 2014
Net sales and long-lived assets by geographical area
Number of Reportable Segments	3us-gaap_NumberOfReportableSegments
Net sales	$ 176,491us-gaap_SalesRevenueNet	$ 168,288us-gaap_SalesRevenueNet
Wood Construction Products
Net sales and long-lived assets by geographical area
Net sales	151,379us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = ssd_WoodConstructionMember	144,676us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = ssd_WoodConstructionMember
Concrete Construction Products
Net sales and long-lived assets by geographical area
Net sales	25,010us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = ssd_ConcreteConstructionMember	23,524us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = ssd_ConcreteConstructionMember
Other
Net sales and long-lived assets by geographical area
Net sales	$ 102us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = ssd_OtherProductsMember	$ 88us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = ssd_OtherProductsMember

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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X

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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X

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