OTHER ASSETS (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Straight-line rent receivables	$ 178,690
Straight-line rent receivables, net		$ 278,833
Non-mortgage loans receivable, net	16,146	63,724
Debt securities, available-for-sale, carrying value	220,630	237,360
Other intangible assets, net	4,859	5,149
Investment in unconsolidated operating entities	40,332	59,301
Other	226,747	232,929
Other assets	$ 687,404	$ 877,296