OTHER ASSETS (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Straight-line rent receivables, net	$ 272,060	$ 267,764
Non-mortgage loans receivable, net	56,125	59,857
Other intangibles, net	6,133	6,496
Investment in unconsolidated operating entities	68,416	49,738
Other	177,368	189,924
Total other assets	$ 580,102	$ 573,779