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Commitments and Contingencies (Details) $ in Millions | Nov. 20, 2017 USD ($)
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Nishimura v. Gentry Homes, Ltd |
Loss Contingencies [Line Items] |
Settlement amount | $ 90

X
- Definition Amount awarded from other party in judgment or settlement of litigation. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_LitigationCaseAxis=ssd_Nishimurav.GentryHomesLtdMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |