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Commitments and Contingencies Litigation Details (Details)	12 Months Ended
	Dec. 31, 2016
Nishimura v. Gentry Homes, Ltd
Loss Contingencies [Line Items]
Number of homes	2,400

X

- Definition

2,400 Gentry Homes cited in a potential third-party lawsuit filed in the Hawaii First Circuit court on July 20, 2011.

+ References

No definition available.

+ Details

Name:	ssd_LossContingencyNumberOfHomes
Namespace Prefix:	ssd_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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- 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:	us-gaap_LitigationCaseAxis=ssd_Nishimurav.GentryHomesLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: