INVESTMENTS IN PARTNERSHIPS AND VENTURES (Schedule of Real Estate Investment Partnerships) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	$ 222,567	$ 155,079
Solar Facilities Investment [Member]
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	194,647	126,339
U.S. Real Estate Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	20,421	19,961
U.S. Real Estate Partnerships [Member] | Variable Interest Entity, Not Primary Beneficiary, Disclosure [Member]
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	932	898
SAWHF
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	$ 7,499	$ 8,779