REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract assets	$ 0		$ 0
Trade receivables	1,060,000		1,090,000
Amount of revenue recognized, previously included in deferred revenue	58,000
Increase in deferred revenue during the period	57,000
Contracted not recognized revenue	2,700,000
Capitalized sales commissions	106,000		107,000
Initial direct costs of leases	53,000		$ 53,000
Amortization of capitalized sales commissions	$ 11,000	$ 6,000