EMPLOYEE BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2018

EMPLOYEE BENEFIT PLANS [Abstract]

Net Periodic Benefit Cost

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

	Six Months Ended June 30,
	2018			2017
Service cost	$	39		$	34
Interest cost		22			23
Amortization of prior service cost		35			38
Amortization of gain		(2	)		(8	)
Net periodic benefit cost	$	94		$	87