Identified Intangible Assets and Intangible Liabilities (Tables)

9 Months Ended

Sep. 30, 2013

Finite-Lived Intangible Assets [Line Items]

Schedule of Identified Intangible Assets and Intangible Liabilities (Table)

	Balance as of
	September 30,		December 31,
(Amounts in thousands)	2013		2012
Identified intangible assets:
Gross amount	$	572,641	$	752,922
Accumulated amortization		(297,391)		(346,613)
Net	$	275,250	$	406,309
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	811,917	$	902,525
Accumulated amortization		(372,329)		(341,536)
Net	$	439,588	$	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	$	26,708
2015		21,543
2016		18,363
2017		15,203
2018		11,005

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