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INCOME TAXES (Detail Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Statutory federal income tax rate	35.00%	35.00%	35.00%
Corporate income tax rate effective in 2018	21.00%
Depreciation percentage on capital expenditures	100.00%
Discrete income tax provision adjustment	$ 1,700,000
Discrete income tax provision adjustment related to vesting of restricted stock	718,000
Total net income tax payments	9,733,000	$ 6,546,000	$ 5,797,000
State income taxes
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards related to state income taxes	14,300,000
Other state credits
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards related to state income taxes	$ 6,900,000

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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