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COMMITMENTS AND CONTINGENCIES (Minimum royalties under mineral leases) (Details) (USD $)
Dec. 31, 2014
COMMITMENTS AND CONTINGENCIES [Abstract]  
2015 $ 19,274,000vmc_MineralLeasesFutureMinimumRoyaltiesDueYearOne
2016–2017 26,954,000vmc_MineralLeasesFutureMinimumRoyaltiesDueInSecondAndThirdYear
2018–2019 19,050,000vmc_MineralLeasesFutureMinimumRoyaltiesDueInFourthAndFifthYear
Thereafter 124,846,000vmc_MineralLeasesFutureMinimumRoyaltiesDueThereafter
Total $ 190,124,000vmc_MineralLeasesFutureMinimumRoyaltiesDue