Real Estate Activity During The Three Months Ended March 31, 2012 (Summary Of Estimated Amortization Of The Acquired Above Market Leases (Net Of Acquired Below Market Leases) And The Acquired In-Place Lease Intangibles) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Acquired In-Place Lease Intangibles [Member]
Restructuring Cost and Reserve [Line Items]
Period from April 1, 2012 through December 31, 2012	$ 8,149
2013	10,084
2014	7,869
2015	5,927
2016	5,199
Acquired Net Below-Market Lease Intangibles [Member]
Restructuring Cost and Reserve [Line Items]
Period from April 1, 2012 through December 31, 2012	2,992
2013	3,709
2014	3,374
2015	2,885
2016	$ 2,512