Our Business And Our Recent History (Narrative) (Details)	9 Months Ended
	Sep. 30, 2012 item state
Real Estate Properties [Line Items]
Number of top population and job growth markets	5
Number of states in which retail properties acquired historically	19
Real Estate Funds [Member]
Real Estate Properties [Line Items]
Number of real estate properties	17
Number of real estate funds	7
Wholly Owned Properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties	29
Square footage of GLA	1,200,000