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EMPLOYEE BENEFIT PLAN (Detail Textuals) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Multiple Employers Retirement Income Plan |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Contribution by employer for retirement income plan | $ 5,000,000 |
Non-qualified Supplemental Retirement Plan ("SERP") |  |
Defined Benefit Plan Disclosure [Line Items] |  |
SERP assets | $ 24,705,000 | $ 23,463,000

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