EMPLOYEE BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost with interest to end of year	$ 63	$ 78	$ 67
Interest cost	39	44	46
Amortization of prior service credit	74	74	74
Amortization of gain	(46)	(8)	(15)
Total net periodic benefit cost	$ 130	$ 188	$ 172