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COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Nov. 30, 2022
Commitments and Contingencies Disclosure [Abstract] |  |
Payments for workers compensation per occurrence | $ 250 |
Payments for general liability per occurrence | 5,900 |
Commercial insurance coverage | $ 75,000 |
Consolidated ownership percentage | 50.00% | 50.00%

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- Definition Commercial Insurance Coverage + References No definition available. + Details
Name: | strl_CommercialInsuranceCoverage
Namespace Prefix: | strl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Consolidated Entities, Ownership Percentage + References No definition available. + Details
Name: | strl_ConsolidatedEntitiesOwnershipPercentage
Namespace Prefix: | strl_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents self insurance general liability, amount per occurrence. + References No definition available. + Details
Name: | strl_SelfInsuranceGeneralLiabilityAmountPerOccurrence
Namespace Prefix: | strl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents self insurance workers compensation claims, amount per occurrence. + References No definition available. + Details
Name: | strl_SelfInsuranceWorkersCompensationClaimsAmountPerOccurrence
Namespace Prefix: | strl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration