Investments in Unconsolidated Real Estate Ventures - Summary of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Unconsolidated real estate ventures - mortgages payable	$ 304,000	$ 304,000
Unamortized deferred financing costs, net	(918)	(1,034)
Unconsolidated real estate ventures - mortgages payable, net	$ 303,082	302,966
The Warner
Schedule of Equity Method Investments [Line Items]
Interest Rate	3.65%
Unconsolidated real estate ventures - mortgages payable	$ 273,000	273,000
1101 17th Street
Schedule of Equity Method Investments [Line Items]
Interest Rate	2.47%
Unconsolidated real estate ventures - mortgages payable	$ 31,000	$ 31,000