SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 13,215,000	$ 8,689,000	$ 7,419,000
Construction commitments	4,100,000
Summary of the categories of property and equipment
Property, Plant and Equipment, Gross	461,131,000	187,796,000
Accumulated depreciation	(132,209,000)	(128,322,000)
Net property and equipment before construction in progress	328,922,000	59,474,000
Capital improvements in progress	17,585,000	3,901,000
Property, Plant and Equipment, net of accumulated depreciation	346,507,000	63,375,000
Deferred Revenue
Current - accrued compensation and other current liabilities	17,519,000	298,000
Long-term - other long term liabilities	$ 13,000,000	0
Revenues and expenses incurred during the TBA
SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnership	100.00%
AssetRetirementObligationAbstract
ARO Beginning Balance	$ 1,044,000	569,000
IncreaseDecreaseInAssetRetirementObligations	1,006,000	453,000
AssetRetirementObligationLiabilitiesSettled	(525,000)	(14,000)
AssetRetirementObligationRevisionOfEstimate	152,000	(2,000)
ResultsOfOperationsAccretionOfAssetRetirementObligations	37,000	38,000
ARO Ending Balance	1,714,000	1,044,000	$ 569,000
AssetRetirementObligationsNoncurrent	1,257,000	434,000
AssetRetirementObligationCurrent	457,000	610,000
CashFDICInsuredAmount	250,000
Land Improvements [Member]
Summary of the categories of property and equipment
Property, Plant and Equipment, Gross	$ 134,520,000	18,546,000
Land Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Tangible assets amortization period	15 years
Land Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Tangible assets amortization period	0 years
Building [Member]
Summary of the categories of property and equipment
Property, Plant and Equipment, Gross	$ 40,925,000	22,698,000
Building [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Tangible assets amortization period	40 years
Building [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Tangible assets amortization period	20 years
Equipment [Member]
Summary of the categories of property and equipment
Property, Plant and Equipment, Gross	$ 204,789,000	112,362,000
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Tangible assets amortization period	40 years
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Tangible assets amortization period	3 years
Furniture and Fixtures [Member]
Summary of the categories of property and equipment
Property, Plant and Equipment, Gross	$ 16,619,000	11,129,000
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Tangible assets amortization period	10 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Tangible assets amortization period	5 years
Leaseholds and Leasehold Improvements [Member]
Summary of the categories of property and equipment
Property, Plant and Equipment, Gross	$ 64,234,000	23,017,000
AssetsHeldUnderCapitalLeasesMember
Summary of the categories of property and equipment
Property, Plant and Equipment, Gross	$ 44,000	$ 44,000