Acquired Intangible Assets And Liabilities (Tables)

12 Months Ended

Dec. 31, 2011

Finite-Lived Intangible Assets [Line Items]

Summary Of Acquired Intangible Assets

	Balance as of
(Amounts in thousands)	December 31, 2011			December 31, 2010
Acquired in place lease value:
Gross amount	$	545,409		$	515,958
Accumulated amortization		(312,499	)		(261,978	)
Net	$	232,910		$	253,980
Acquired above market leases:
Gross amount	$	87,800		$	87,622
Accumulated amortization		(58,099	)		(47,083	)
Net	$	29,701		$	40,539
Acquired below market leases:
Gross amount	$	201,275		$	189,990
Accumulated amortization		(115,456	)		(96,740	)
Net	$	85,819		$	93,250

Schedule Of Estimated Annual Amortization Of Leases

(Amounts in thousands)
2012	$	7,831
2013		8,400
2014		7,042
2015		6,343
2016		5,290

Acquired In Place Lease Value [Member]

Finite-Lived Intangible Assets [Line Items]

Schedule Of Estimated Annual Amortization Of Leases

(Amounts in thousands)
2012	$	44,587
2013		40,533
2014		35,779
2015		27,559
2016		26,604