Finite Lived Intangible Assets, Measurement Input

No definition available.

Name:	strl_FiniteLivedIntangibleAssetsMeasurementInput
Namespace Prefix:	strl_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted-average period of amortization for finite-lived intangible asset acquired in business combination, asset acquisition, and from joint venture formation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481283/985-20-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-1

+ Details

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-1

+ Details

Name:	us-gaap_AcquiredIndefiniteLivedIntangibleAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of identifiable intangible asset acquired in business combination and recognized at acquisition date. Excludes goodwill and financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479303/805-10-55-41

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-8

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 45
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479303/805-10-55-45

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-2

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-1

+ Details

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase in finite-lived intangible asset acquired in business combination, asset acquisition, and from joint venture formation. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 805
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478072/944-805-50-1

+ Details

Name:	us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=strl_StoneRidgeContractingLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=strl_MeasurementInputCustomerAttritionRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputDiscountRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MeasurementInputTypeAxis=strl_MeasurementInputRoyaltyRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=strl_CECFacilitiesGroupLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

ACQUISITIONS - Schedule of Identifiable Intangible Assets Acquired (Details) - USD ($) $ in Thousands			6 Months Ended
	Jun. 01, 2026	Sep. 01, 2025	Jun. 30, 2026
Acquired Indefinite-lived Intangible Assets [Line Items]
Weighted Average Life (Years)			24 years
Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Weighted Average Life (Years)			24 years
Trade names
Acquired Indefinite-lived Intangible Assets [Line Items]
Weighted Average Life (Years)			24 years
Stone Ridge Contracting, LLC
Acquired Indefinite-lived Intangible Assets [Line Items]
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill	$ 119,500
Stone Ridge Contracting, LLC \| Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Weighted Average Life (Years)	25 years
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill	$ 110,000
Stone Ridge Contracting, LLC \| Customer relationships \| Measurement Input, Customer Attrition Rate
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets measurement input	5.00%
Stone Ridge Contracting, LLC \| Customer relationships \| Measurement Input, Discount Rate
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets measurement input	22.00%
Stone Ridge Contracting, LLC \| Trade names
Acquired Indefinite-lived Intangible Assets [Line Items]
Weighted Average Life (Years)	25 years
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill	$ 9,500
Stone Ridge Contracting, LLC \| Trade names \| Measurement Input, Discount Rate
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets measurement input	22.00%
Stone Ridge Contracting, LLC \| Trade names \| Measurement Input, Royalty Rate
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets measurement input	1.00%
CEC Facilities Group, LLC
Acquired Indefinite-lived Intangible Assets [Line Items]
Fair Value		$ 227,800
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill		$ 227,800
CEC Facilities Group, LLC \| Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Weighted Average Life (Years)		25 years
Fair Value		$ 156,300
CEC Facilities Group, LLC \| Customer relationships \| Measurement Input, Customer Attrition Rate
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets measurement input		10.00%
CEC Facilities Group, LLC \| Customer relationships \| Measurement Input, Discount Rate
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets measurement input		13.50%
CEC Facilities Group, LLC \| Trade names
Acquired Indefinite-lived Intangible Assets [Line Items]
Weighted Average Life (Years)		25 years
Fair Value		$ 71,500
CEC Facilities Group, LLC \| Trade names \| Measurement Input, Discount Rate
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets measurement input		12.50%
CEC Facilities Group, LLC \| Trade names \| Measurement Input, Royalty Rate
Acquired Indefinite-lived Intangible Assets [Line Items]
Finite lived intangible assets measurement input		1.50%