XML 68 R55.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Revenue from Customers - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Remaining performance obligation, percentage | 63.00% |  |
Expected timing of satisfaction | 12 months |  |
Operating income (Loss) |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Estimated construction gain (loss) before tax | $ 14,435 | $ 7,439 | $ (9,044)
Costs and Estimated Earnings in Excess of Billings |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Provision for estimated loss on uncompleted contracts | $ 13,905 | $ 7,142 |

X
- Definition Represents net estimated gross profit (loss) before tax. + References No definition available. + Details
Name: | strl_EstimatedConstructionGrossProfitLossBeforeTax
Namespace Prefix: | strl_
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_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045 + Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of remaining performance obligation to total remaining performance obligation not recognized as revenue. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045 + Details
Name: | us-gaap_RevenueRemainingPerformanceObligationPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cost incurred on construction contract for unapproved change order, claim, or similar item subject to uncertainty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 910 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6471471&loc=d3e48698-109348 + Details
Name: | us-gaap_UnapprovedChangeOrdersAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis=2022-01-01
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OperatingIncomeLossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=strl_CostsAndEstimatedEarningsInExcessOfBillingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |