PENSIONS AND OTHER EMPLOYEE BENEFITS (Net Benefit Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net periodic benefit cost:
Service cost	$ 194	$ 195	$ 195
Interest cost	663	722	758
Expected return on plan assets	(901)	(825)	(808)
Amortization of unrecognized net actuarial loss	374	443	473
Total net periodic benefit cost	$ 330	$ 535	$ 618