Identified Intangible Assets and Intangible Liabilities (Tables)

6 Months Ended

Jun. 30, 2013

Finite-Lived Intangible Assets [Line Items]

Schedule of Identified Intangible Assets and Intangible Liabilities (Table)

	Balance as of
	June 30,		December 31,
(Amounts in thousands)	2013		2012
Identified intangible assets:
Gross amount	$	654,964	$	753,022
Accumulated amortization		(365,854)		(346,664)
Net	$	289,110	$	406,358
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	816,671	$	902,525
Accumulated amortization		(363,687)		(341,536)
Net	$	452,984	$	560,989

Below Market Leases Net Of Above Market Leases [Member]

Finite-Lived Intangible Assets [Line Items]

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

(Amounts in thousands)
2014	$	41,069
2015		38,263
2016		36,321
2017		30,936
2018		29,171

Other Identified Intangible Assets [Member]

Finite-Lived Intangible Assets [Line Items]

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

(Amounts in thousands)
2014	$	27,533
2015		22,369
2016		19,189
2017		16,029
2018		11,830

Tenant Under Ground Leases [Member]

Finite-Lived Intangible Assets [Line Items]

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

(Amounts in thousands)
2014	$	3,921
2015		3,921
2016		3,921
2017		3,921
2018		3,921