Discontinued Operations - Additional Information (Details)	0 Months Ended
	Mar. 22, 2013 Property
Ready-Mix Concrete
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets acquired in noncash asset exchange	42
Aggregates
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets acquired in noncash asset exchange	2