XML 67 R56.htm IDEA: XBRL DOCUMENT
v3.22.1

Consolidated 50% Owned Subsidiaries - Narrative (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) entity insurancePolicy | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Jun. 30, 2020 entity
Noncontrolling Interest [Line Items] |  |  |  |
Consolidated ownership percentage | 50.00% |  |  |
Consolidated 50% owned subsidiaries, number of entities | entity | 2 |  |  | 2
Members’ interest subject to mandatory redemption | $ 40,000 | $ 40,000 |  |
Death And Disability Insurance Policies, Number Purchased | insurancePolicy | 2 |  |  |
Death and permanent total disability insurance policies, per policy | $ 20,000 |  |  |
Myers |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Earnings from consolidated 50% owned subsidiaries | 13,100 | $ 11,100 | $ 9,800 |
Myers | Variable Interest Entity, Primary Beneficiary |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Members’ interest subject to mandatory redemption | $ 20,000 |  |  |

X
- Definition Consolidated 50% Owned Subsidiaries, Number Of Entities + References No definition available. + Details
Name: | strl_Consolidated50OwnedSubsidiariesNumberOfEntities
Namespace Prefix: | strl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Death And Disability Insurance Policies, Number Purchased + References No definition available. + Details
Name: | strl_DeathAndDisabilityInsurancePoliciesNumberPurchased
Namespace Prefix: | strl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Death And Disability Insurance Policies, Per Policy Amount + References No definition available. + Details
Name: | strl_DeathAndDisabilityInsurancePoliciesPerPolicyAmount
Namespace Prefix: | strl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The Member's interest subject to mandatory redemption. + References No definition available. + Details
Name: | strl_MembersInterestSubjectToMandatoryRedemption
Namespace Prefix: | strl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax of income (loss) of subsidiary attributable to the parent entity. + References No definition available. + Details
Name: | us-gaap_IncomeLossFromSubsidiariesBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | dei_LegalEntityAxis=strl_MyersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |