Identified Intangible Assets and Intangible Liabilities (Tables)

12 Months Ended

Dec. 31, 2011

Schedule of Identified Intangible Assets and Intangible Liabilities (Table)

	Balance as of
	December 31,		December 31,
(Amounts in thousands)	2011		2010
Identified intangible assets:
Gross amount	$	679,648	$	681,270
Accumulated amortization		(359,944)		(335,113)
Net	$	319,704	$	346,157
Identified intangible liabilities (included in deferred credit):
Gross amount	$	841,440	$	856,689
Accumulated amortization		(374,253)		(335,317)
Net	$	467,187	$	521,372

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	$	49,032
2013		44,373
2014		37,715
2015		34,590
2016		31,518

Other Identified Intangible Assets [Member]

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

(Amounts in thousands)
2012	$	46,572
2013		39,355
2014		21,002
2015		16,043
2016		13,507

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