OTHER ASSETS (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Straight-line rent receivables, net	$ 128,212	$ 120,325
Unsecured loans receivable, net	65,009	62,118
Goodwill and other intangibles, net	481,038	515,429
Assets held for sale	122,684	111,556
Other	118,883	112,257
Total other assets	$ 915,826	$ 921,685