Business Combinations and Discontinued Operations - Additional Information (Detail) (Business Acquisitions)	1 Months Ended
Jul. 31, 2013 Facility T
Business Acquisitions
Business Combination Segment Allocation [Line Items]
Aggregate quarries, reserves	800,000,000
Number of quarries acquired	3

The number of businesses acquired by the entity during the period.

No definition available.

Name:	us-gaap_NumberOfBusinessesAcquired
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration