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Basis of Presentation - Dividend Declaration (Details) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Dividend Declaration [Abstract]
Cash dividends declared per common share	$ 0.25	$ 0.23

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- Definition

Dividend Declaration [Abstract]

+ References

No definition available.

+ Details

Name:	ssd_DividendDeclarationAbstract
Namespace Prefix:	ssd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration