EMPLOYEE BENEFIT PLANS (Tables)

9 Months Ended

Sep. 30, 2018

EMPLOYEE BENEFIT PLANS [Abstract]

Net Periodic Benefit Cost

Net periodic benefit costs for such retirement medical plans were as follows:

	Nine Months Ended September 30,
	2018			2017
Service cost	$	58		$	50
Interest cost		33			35
Amortization of prior service cost		52			55
Amortization of gain		(2	)		(11	)
Net periodic benefit cost	$	141		$	129