Acquired Intangible Assets And Liabilities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of below market leases	$ 2,400	$ 2,600	$ 4,700	$ 5,300
Expected average remaining lives of acquired below market leases			2142 days
Amortization of intangible assets			$ 33,830	42,687
Acquired Above-Market Lease Value
Finite-Lived Intangible Assets [Line Items]
Expected average remaining lives			1277 days
Acquired-In Place Lease Value
Finite-Lived Intangible Assets [Line Items]
Expected average remaining lives			2174 days
Amortization of intangible assets	$ 10,500	$ 18,400	$ 22,100	$ 33,400
Weighted average remaining contractual life for acquired leases excluding renewals or extensions			1684 days