Disposal Group, Including Discontinued Operation, Deferred Consideration, Number of Payments Due

No definition available.

Name:	strl_DisposalGroupIncludingDiscontinuedOperationDeferredConsiderationNumberOfPaymentsDue
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Data Type:	xbrli:integerItemType
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- Definition

Disposal Group, Including Discontinued Operation, Deferred Consideration, Number Of Payments Received

+ References

No definition available.

+ Details

Name:	strl_DisposalGroupIncludingDiscontinuedOperationDeferredConsiderationNumberOfPaymentsReceived
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Data Type:	xbrli:integerItemType
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Period Type:	duration

- Definition

Disposal Group, Including Discontinued Operation, Payment Due Year One

+ References

No definition available.

+ Details

Name:	strl_DisposalGroupIncludingDiscontinuedOperationDeferredConsiderationPaymentDueYearOne
Namespace Prefix:	strl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Disposal Group, Including Discontinued Operation, Deferred Consideration, Payment Due Year Three

+ References

No definition available.

+ Details

Name:	strl_DisposalGroupIncludingDiscontinuedOperationDeferredConsiderationPaymentDueYearThree
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Disposal Group, Including Discontinued Operation, Ownership Percentage in Disposed Asset

+ References

No definition available.

+ Details

Name:	strl_DisposalGroupIncludingDiscontinuedOperationOwnershipPercentageInDisposedAsset
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Data Type:	dtr-types1:percentItemType
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Period Type:	instant

- 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

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- Definition

This element represents the cash inflow during the period from the sale of a component of the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=strl_MyersSonsConstructionLPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DISPOSITIONS - Narrative (Details) $ in Thousands		3 Months Ended	12 Months Ended
DISPOSITIONS - Narrative (Details) $ in Thousands	Nov. 30, 2022 USD ($) payment	Mar. 31, 2024 USD ($) payment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposition, net of cash disposed			$ 0	$ 14,000	$ (15,789)
Discontinued Operations \| Myers & Sons Construction L.P
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operation, ownership percentage in disposed asset	50.00%
Proceeds from sale of equity method investments	$ 18,000
Disposal group, including discontinued operation, deferred consideration, number of payments received \| payment		2
Disposition, net of cash disposed		$ 14,000
Disposal group, including discontinued operation, deferred consideration, series payment due \| payment	2
Disposal group, including discontinued operation, payment due year one	$ 2,000
Disposal group, including discontinued operation, payment due year three	$ 2,000