Identified Intangible Assets and Intangible Liabilities (Tables)

6 Months Ended

Jun. 30, 2011

Schedule of Identified Intangible Assets and Intangible Liabilities (Table)

	Balance as of
	June 30,		December 31,
(Amounts in thousands)	2011		2010
Identified intangible assets:
Gross amount	$	680,598	$	687,253
Accumulated amortization		(363,341)		(338,508)
Net	$	317,257	$	348,745
Identified intangible liabilities (included in deferred credit):
Gross amount	$	877,836	$	870,623
Accumulated amortization		(374,438)		(341,718)
Net	$	503,398	$	528,905

Below Market Leases Net Of Above Market Leases [Member]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

(Amounts in thousands)
2012	$	52,025
2013		44,095
2014		38,240
2015		35,472
2016		32,093

Other Identified Intangible Assets [Member]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

(Amounts in thousands)
2012	$	44,777
2013		37,281
2014		18,885
2015		13,929
2016		11,325

Tenant Under Ground Leases [Member]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

(Amounts in thousands)
2012	$	1,377
2013		1,377
2014		1,377
2015		1,377
2016		1,377