XML 67 R54.htm IDEA: XBRL DOCUMENT v3.8.0.1

Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests - Components of Noncontrolling Interest Subject to Mandatory Redemption (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Noncontrolling Interest [Abstract]
Members’ interest subject to mandatory redemption	$ 40,000	$ 40,000
Net accumulated earnings	7,386	5,230
Total liability	$ 47,386	$ 45,230

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

The element that represents the member's interest subject to mandatory redemption and undistributed earnings.

+ References

No definition available.

+ Details

Name:	strl_MembersInterestSubjectToMandatoryRedemptionAndUndistributedEarnings
Namespace Prefix:	strl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The net amount of undistributed earnings (distributed earnings) of domestic subsidiaries or domestic joint ventures intended to be permanent.

+ References

No definition available.

+ Details

Name:	strl_UndistributedEarningsOfDomesticSubsidiariesNet
Namespace Prefix:	strl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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