Segment Reporting (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets
Long-lived assets	$ 5,469,846	$ 3,333,654
Total assets	8,501,449	4,678,950
Real Estate Ownership
Assets
Long-lived assets	5,469,846	3,333,654
Total assets	8,146,004	4,537,853
Investment Management
Assets
Long-lived assets	0	0
Total assets	$ 355,445	$ 141,097