Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Straight-line rent receivables, net	$ 219,064	$ 187,572
Non-mortgage loans receivable, net	37,926	17,620
Other intangibles, net	13,224	19,122
Marketable securities	0	76,046
Other	142,189	151,398
Total other assets	$ 412,403	$ 451,758