RETIREMENT BENEFIT PLANS (Schedule of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Service cost	$ 2,704	$ 565
Interest cost	351	95
Expected return on plan assets	(944)	(224)
Recognized net actuarial loss	8	8
Net period benefit cost	$ 2,119	$ 444