OTHER ASSETS (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Straight-line rent receivables	$ 277,078
Straight-line rent receivables, net		$ 278,833
Non-mortgage loans receivable, net	44,301	63,724
Debt securities, available-for-sale, carrying value	189,024	237,360
Other intangible assets, net	4,956	5,149
Investment in unconsolidated operating entities	45,608	59,301
Other	241,193	232,929
Other assets	$ 802,160	$ 877,296