Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Schedule Of Equity Method Investments [Line Items]
Company's share of equity (Company's basis)		$ 282,162	$ 241,004
Unconsolidated Real Estate Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Net property		1,463,500	1,258,999
Other assets		270,892	158,672
Other liabilities		124,949	69,028
Debt, net		1,007,062	794,571
Equity		602,381	554,072
Company's share of equity (Company's basis)	[1],[2]	$ 282,162	$ 241,004

[1] Does not include the negative investment balance in one real estate venture totaling $1.1 million as of December 31, 2015, which is included in other liabilities. There is no negative investment balance as of September 30, 2016 because the Company sold its entire remaining 50% interest in the applicable real estate venture (See “Coppell Associates” section below) during the three month period ended March 31, 2016.

[2] This amount includes the effect of the basis difference between the Company's historical cost basis and the basis recorded at the Real Estate Venture level, which is typically amortized over the life of the related assets and liabilities. Basis differentials occur from the impairment of investments, purchases of third party interests in existing Real Estate Ventures and upon the transfer of assets that were previously owned by the Company into a Real Estate Venture. In addition, certain acquisition, transaction and other costs may not be reflected in the net assets at the Real Estate Venture level.