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SEGMENT REPORTING (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of operating segments	4us-gaap_NumberOfOperatingSegments
Number of reportable segments	4us-gaap_NumberOfReportableSegments
Radius for delivering product, minimum	20vmc_RadiusForDeliveringProductMinimum
Radius for delivering product, maximum	25vmc_RadiusForDeliveringProductMaximum
Equity method investments	$ 22,924us-gaap_EquityMethodInvestments	$ 22,962us-gaap_EquityMethodInvestments	$ 22,965us-gaap_EquityMethodInvestments
Concrete
Segment Reporting Information [Line Items]
Number Of States In Which Segments Serve	6
Percentage of product weight attributable to Aggregates	78.00%
Asphalt Mix
Segment Reporting Information [Line Items]
Number Of States In Which Segments Serve	4
Percentage of product weight attributable to Aggregates	95.00%
Aggregates
Segment Reporting Information [Line Items]
Number Of States In Which Segments Serve	20
Number Of Additional States Served	5
Nondomestic [Member]
Segment Reporting Information [Line Items]
Long-lived assets	139,427	140,504	138,415
Nondomestic [Member] \| Aggregates
Segment Reporting Information [Line Items]
Product sales	$ 14,699	$ 12,339	$ 14,733