INVESTMENTS IN PARTNERSHIPS AND VENTURES (Schedule of Real Estate Investment Partnerships) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	$ 185,679	$ 155,079
Solar Facilities Investment and Solar Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	156,950	126,339
U.S. Real Estate Partnerships
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	20,298	19,961
U.S. Real Estate Partnerships | Variable Interest Entities
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	921	898
SAWHF
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	$ 8,431	$ 8,779