Investment In Unconsolidated Joint Ventures (Narrative) (Details) (USD $)				3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Prudential [Member]	Mar. 31, 2014 636 Pierce Street [Member]
Schedule of Equity Method Investments [Line Items]
Gross Value	$ 40,400,000		$ 164,800,000
Property subject to debt				26,100,000
Proceeds received from contribution of property				11,400,000
Share of net assets less book value percentage				80.00%
Investment in unconsolidated joint ventures	81,411,000	70,504,000		14,300,000
Principal outstanding				23,000,000
Net proceeds from joint venture				17,500,000
Gain on contribution of property				$ 1,900,000