INVESTMENTS IN PARTNERSHIPS AND VENTURES (Schedule of Real Estate Investment Partnerships) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	$ 155,079	$ 227,962
Solar Ventures
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	126,339	97,011
U.S. Real Estate Partnerships
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	19,961	19,114
U.S. Real Estate Partnerships | Variable Interest Entities
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	898	1,046
SAWHF
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships	$ 8,779	12,695
LTPP | Consolidated Funds and Ventures
Schedule of Equity Method Investments [Line Items]
Total investments in partnerships		$ 99,142