Investment in Unconsolidated Joint Ventures - Balance Sheet of Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Real estate, net	$ 2,872,484	$ 3,023,249
Receivables and other assets	310,050	299,709
Total assets	3,448,055	3,609,281
Mortgage debt	1,058,691	1,235,502
Total liabilities and equity	3,448,055	3,609,281
Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Cash	2,305	559
Restricted cash	183	0
Real estate, net	213,161	46,087
Intangible assets, net	8,771	2,265
Receivables and other assets	11,534	3,513
Total assets	235,954	52,424
Mortgage debt	118,015	13,105
Other liabilities	9,339	466
Partners' equity	108,600	38,853
Total liabilities and equity	$ 235,954	$ 52,424