Equity Investments in Unconsolidated Joint Ventures Equity Investments in Unconsolidated Joint Ventures - Disposition Activity (Details) (Village of Oriole Plaza [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015 sqft
Village of Oriole Plaza [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity Method Investment, Ownership Percentage	30.00%
Area of Real Estate Property	156,000
Proceeds from Sale of Real Estate	$ 8.3