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INCOME TAXES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income tax benefit at federal statutory rate	$ 31,585	$ 711	$ 2,509
State income tax benefit, net of federal impact	1,440	34	158
Incentive stock options and restricted stock not deductible for tax purposes	$ (269)	(79)	(43)
Percentage depletion carryover		129	174
Other, net	$ 171	(183)	(81)
Increase in valuation allowance	$ (32,927)	$ (612)	$ (2,717)
Income tax benefit (expense)

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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