INVESTMENTS IN PARTNERSHIPS AND VENTURES (Schedule of Income (Loss) in Earnings of Unconsolidated Venture) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
U.S. Real Estate Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Gross revenue	$ 624	$ 543	$ 1,920	$ 1,722
Operating expenses	437	487	1,380	1,377
Net income (loss)	(727)	(582)	(1,288)	(1,300)
Solar Facilities Investment [Member]
Schedule of Equity Method Investments [Line Items]
Gross revenue	16,081	6,118	38,367	18,639
Operating expenses	1,144	1,290	4,687	4,107
Net income (loss)	14,940	4,755	33,749	14,974
SAWHF
Schedule of Equity Method Investments [Line Items]
Gross revenue	1,321	1,693	4,090	3,998
Operating expenses	236	376	722	1,927
Net income (loss)	$ (1,092)	$ (4,463)	$ 1,690	$ (2,896)