INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
INCOME TAXES [Abstract]
Effective tax rate	21.50%	26.70%	22.30%	25.90%
Federal corporate tax rate			21.00%		35.00%
Cap on deductibility on compensation of individual			$ 1,000
Unrecognized tax benefits	$ 5,285		5,285		$ 4,781
Accrued interest and penalties	$ 1,931		$ 1,931		$ 1,882

Amount of maximum deductibility on compensation of an individual pursuant to Tax Cuts and Jobs Act of 2017.

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- Definition

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

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

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- Definition

Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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