INVESTMENTS IN PARTNERSHIPS AND VENTURES (Schedule of Balance Sheet Accounts Related to Equity Method Investments) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Solar Facilities Investment and Solar Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Total assets	$ 299,606	$ 279,960
Other Liabilities	23,518	12,833
U.S. Real Estate Partnerships
Schedule of Equity Method Investments [Line Items]
Total assets	55,077	56,238
Debt	6,061	6,530
Other Liabilities	32,310	32,165
SAWHF
Schedule of Equity Method Investments [Line Items]
Total assets	74,033	74,803
Other Liabilities	$ 154	$ 496