Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Equity Method Investments [Line Items]
Company’s share of equity (Company’s basis)		$ 281,331	$ 241,004	$ 225,004
Unconsolidated Real Estate Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Net property		1,483,067	1,258,999
Other assets		231,972	158,672
Other liabilities		129,486	69,028
Debt, net		989,738	794,571
Equity		595,815	554,072
Company’s share of equity (Company’s basis)	[1],[2]	$ 281,331	$ 241,004

[1] Does not include the negative investment balance of one real estate venture totaling $1.1 million as of December 31, 2015, which is included in other liabilities. The Company disposed of its interest in this venture on January 29, 2016. See “Coppell Associates” section below for further details.

[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.