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Basis of Presentation - Revenue from External Customers (Details) | 9 Months Ended
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Sep. 30, 2017
Maximum |
Revenue from External Customer [Line Items] |
Service sales percentage of net sales, less than | 1.00%

X
- Definition Percentage of net sales attributed to services sales. + References No definition available. + Details
Name: | ssd_ServiceSalesPercentageOfNetSales
Namespace Prefix: | ssd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |