Segment Reporting (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets
Long-lived assets	$ 5,456,613	$ 3,333,654
Total assets	8,293,748	4,678,950
Real Estate Ownership
Assets
Long-lived assets	5,456,613	3,333,654
Total assets	8,155,305	4,537,853
Investment Management
Assets
Long-lived assets	0	0
Total assets	$ 138,443	$ 141,097