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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Name:	us-gaap_BusinessCombinationAcquisitionRelatedCosts
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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
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The number of businesses acquired by the entity during the period.

No definition available.

Name:	us-gaap_NumberOfBusinessesAcquired
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Data Type:	xbrli:integerItemType
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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 805
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Business Combination, Consideration Transferred, Working Capital Adjustments

No definition available.

Name:	uscr_BusinessCombinationConsiderationTransferredWorkingCapitalAdjustments
Namespace Prefix:	uscr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Number Of Assets Acquired, Aggregate Facilities

No definition available.

Name:	uscr_NumberOfAssetsAcquiredAggregateFacilities
Namespace Prefix:	uscr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number Of Assets Acquired, Mixer Trucks

No definition available.

Name:	uscr_NumberOfAssetsAcquiredMixerTrucks
Namespace Prefix:	uscr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Number Of Assets Acquired, Ready-mix Concrete Plants

No definition available.