Investment in Unconsolidated Ventures (Summary of Results of Operations of Unconsolidated Real Estate Ventures) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of results of operations of Real Estate Ventures
Income (Loss) from Equity Method Investments	$ 3,664	$ 2,741	$ 3,775
Unconsolidated real estate ventures [Member]
Summary of results of operations of Real Estate Ventures
Revenue	102,919	164,013	145,867
Operating expenses	40,436	70,775	63,715
Interest expense, net	26,529	41,633	42,032
Depreciation and amortization	35,138	50,241	39,172
Net income	816	1,364	948
Income (Loss) from Equity Method Investments	$ 3,664	$ 2,741	$ 3,775