XML 97 R92.htm IDEA: XBRL DOCUMENT v2.4.1.9

Note 20 - Quarterly Financial Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Charges to Estimated Revenues	$ 9.5strl_ChargesToEstimatedRevenues	$ 4.5strl_ChargesToEstimatedRevenues	$ 37.7strl_ChargesToEstimatedRevenues	$ 20.6strl_ChargesToEstimatedRevenues	$ 4.3strl_ChargesToEstimatedRevenues
Valuation Allowances and Reserves, Adjustments			$ 28.2us-gaap_ValuationAllowancesAndReservesAdjustments

X

- Definition

Charges to Estimated Revenues

+ References

No definition available.

+ Details

Name:	strl_ChargesToEstimatedRevenues
Namespace Prefix:	strl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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

X

- Definition

Total of the adjustments in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration