Interim Financial Statements (Operating Partnership) (Details)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
The Operating Partnership [Abstract]
Number of urban and suburban shopping centers in the Company's owned portfolio	24
Number of states in which Company operates	12
Number Of Classes Of Preferred Stock	three
Common stock, shares outstanding	63,319,539		63,101,614
Number Of Classes Of Preferred Equity	two
Managing general partnership interest of the Company in the Operating Partnership (in hundredths)	72.00%
Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest	72.00%	72.00%
Units of Partnership Interest, Amount	88,454,989
Number Of Operating Partnership Units Outstanding Owned By Company	63,319,539
Series J Preferred Stock [Member]
The Operating Partnership [Abstract]
Dividend rate (in hundredths)	6.50%
Preferred Stock, Shares Outstanding	7,700,000		7,700,000
Series B Preferred Stock [Member]
The Operating Partnership [Abstract]
Units of Partnership Interest, Terms of Conversion	one share of nonparticipating Series B Preferred Stock per each Operating Partnership unit
Preferred Stock, voting rights	one vote per share
Convertible Preferred Stock, Terms of Conversion	ratio of 14,000 shares of Series B Preferred Stock for one share of common stock
Preferred Stock, Shares Outstanding	25,117,000		25,151,069
Starwood Transaction [Member]
The Operating Partnership [Abstract]
Number of Centers Held for Sale	seven