OTHER ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Straight-line rent receivables, net	$ 262,028	$ 244,580
Non-mortgage loans receivable, net, carrying amount	54,955	52,544
Other intangibles, net	6,842	8,190
Investments in unconsolidated operating entities	43,049	28,431
Other	173,421	184,619
Total other assets	$ 540,295	$ 518,364