REVENUE (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Balance at beginning of year	$ 127,075	$ 117,614
Deferral of unearned revenue	174,404	166,053
Recognition of unearned revenue	(164,972)	(156,592)
Balance at end of year	$ 136,507	$ 127,075