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