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Commitments and Contingencies (Details)	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Ownership interest in subsidiaries	50.00%

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- Definition

Consolidated Entities, Ownership Percentage

+ References

No definition available.

+ Details

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Namespace Prefix:	strl_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration