INVESTMENTS IN PARTNERSHIPS AND VENTURES (Schedule of Income Loss in Earnings of Unconsolidated Venture) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
U.S. Real Estate Partnerships
Schedule of Equity Method Investments [Line Items]
Gross revenue	$ 632	$ 694	$ 1,296	$ 1,417
Operating expenses	473	548	942	1,085
Net income (loss)	318	(367)	(561)	(676)
Solar Facilities Investment and Solar Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Gross revenue	11,952	5,932	22,286	12,522
Operating expenses	1,648	1,479	3,543	2,817
Net income (loss)	10,318	5,136	18,809	10,219
SAWHF
Schedule of Equity Method Investments [Line Items]
Gross revenue	2,569	1,915	2,769	2,305
Operating expenses	156	613	487	1,551
Net income (loss)	$ 749	$ (912)	$ 2,783	$ 1,567