Investment in Unconsolidated Ventures - Summary of Financial Position of Real Estate Ventures (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule Of Equity Method Investments [Line Items]
Debt		$ 794,571	$ 965,077
Company's share of equity (Company's basis)		241,004	225,004	$ 180,512
Unconsolidated Real Estate Ventures [Member]
Schedule Of Equity Method Investments [Line Items]
Net property		1,258,999	1,281,282
Other assets		158,672	195,121
Other liabilities		68,028	68,481
Debt		794,571	965,077
Equity		554,072	442,845
Company's share of equity (Company's basis)	[1],[2]	$ 241,004	$ 225,004

[1] Does not include the negative investment balance of one real estate venture totaling $1.1 million and $1.2 million as of December 31, 2015 and 2014, respectively, which is included in other liabilities.

[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.