EMPLOYEE BENEFIT PLANS (Details) - Pension Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Contribution Plan Disclosure [Line Items]
Credited service period	1 year
Pension expense	$ 3,087	$ 3,126	$ 3,100
Employer contributions to profit sharing and retirement savings-investment plan	$ 2,512	$ 2,493	$ 2,533