SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Intangible Assets
Original Cost	$ 25,250,000	$ 25,250,000
Accumulated amortization	(9,419,000)	(6,427,000)
Intangibles, Net	15,831,000	18,823,000
Intangible Assets
Amortization expense attributable to intangible assets	3,000,000	2,600,000	1,400,000
Estimated amortization expense attributable to intangible assets in 2014	3,000,000
Estimated amortization expense attributable to intangible assets in 2015	3,000,000
Estimated amortization expense attributable to intangible assets in 2016	3,000,000
Estimated amortization expense attributable to intangible assets in 2017	1,300,000
Estimated amortization expense attributable to intangible assets in 2018	1,000,000
Non-compete agreements
Intangible Assets
Original Cost	15,236,000	15,236,000
Accumulated amortization	(7,002,000)	(5,374,000)
Intangibles, Net	8,234,000	9,862,000
Customer contracts
Intangible Assets
Original Cost	6,171,000	6,171,000
Accumulated amortization	(2,301,000)	(1,003,000)
Intangibles, Net	3,870,000	5,168,000
Mining permits
Intangible Assets
Original Cost	3,843,000	3,843,000
Accumulated amortization	(116,000)	(50,000)
Intangibles, Net	$ 3,727,000	$ 3,793,000