Investment in Unconsolidated Joint Ventures - Balance Sheet of Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Real estate, net	$ 2,890,321	$ 3,023,249
Receivables and other assets	304,509	299,709
Total assets	3,627,616	3,609,281
Mortgage debt	1,234,599	1,235,502
Total liabilities and equity	3,627,616	3,609,281
Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Cash	1,756	559
Restricted cash	44	0
Real estate, net	213,953	46,087
Intangible assets, net	9,572	2,265
Receivables and other assets	11,872	3,513
Total assets	237,197	52,424
Mortgage debt	118,063	13,105
Other liabilities	9,421	466
Partners' equity	109,713	38,853
Total liabilities and equity	$ 237,197	$ 52,424