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v3.22.4

Related Party Transactions (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($)
Related Party Transaction [Line Items] |
Lease expiration period | 10 years
RLW |
Related Party Transaction [Line Items] |
Lease expense | $ 2,000
RLW | Minimum |
Related Party Transaction [Line Items] |
Lease expiration period | 4 years
RLW | Maximum |
Related Party Transaction [Line Items] |
Lease expiration period | 10 years

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- Definition Lessee, Lease, ExpirationPeriod + References No definition available. + Details
Name: | strl_LesseeLeaseExpirationPeriod
Namespace Prefix: | strl_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977 + Details
Name: | us-gaap_OperatingLeaseExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=strl_RLWMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |