DEFERRED REVENUE (Narrative) (Details) (USD $)	1 Months Ended		3 Months Ended
	Sep. 30, 2013 T	Dec. 31, 2012 T	Mar. 31, 2015 agreement property	Mar. 31, 2014	Mar. 31, 2016
Deferred Revenue Arrangement [Line Items]
Number of volumetric production payment transactions			2
Number of facilities			8
Owned quarries			7
Leased quarries			1
Purchaser's proceeds from sale of production	$ 153,282,000	$ 73,644,000	$ 0	$ 187,000
Volumetric production payment termination date	Sep. 30, 2051	Dec. 31, 2052
Volumetric production payment estimated percentage sold	11.50%	10.50%
Volumetric production payment estimated tons to be delivered	29,000,000	15,000,000
Maximum [Member]
Deferred Revenue Arrangement [Line Items]
Tons subject to volumetric production payment	250,800,000	143,200,000
Scenario, Forecast [Member]
Deferred Revenue Arrangement [Line Items]
Estimated deferred revenue to be recognized in the next 12 months					$ 6,000,000