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Basis of Presentation (Details 5) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Acquisitions  
Maximum period for payment for adjustments to provisional fair value measurements 1 year
S&P Clever  
Acquisitions  
Deferred consideration payment 0.7ssd_BusinessCombinationContingentConsiderationArrangementsDeferredConsiderationPayment
/ us-gaap_BusinessAcquisitionAxis
= ssd_SAndPCleverMember
Contingent consideration payment 0.3ssd_BusinessCombinationContingentConsiderationArrangementsContingentConsiderationPayment
/ us-gaap_BusinessAcquisitionAxis
= ssd_SAndPCleverMember
Bierbach GmbH & Co. KG.  
Acquisitions  
Contingent consideration payment 0.2ssd_BusinessCombinationContingentConsiderationArrangementsContingentConsiderationPayment
/ us-gaap_BusinessAcquisitionAxis
= ssd_BierbachGmbHAndCo.KGMember