Identified Intangible Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2016

Finite-Lived Intangible Assets [Line Items]

Schedule of Identified Intangible Assets and Intangible Liabilities [Table Text Block]

The following summarizes our identified intangible assets (primarily above-market leases) and liabilities (primarily acquired below-market leases) as of September 30,2016 and December 31,2015.

(Amounts in thousands)	Balance as of
	September 30, 2016		December 31, 2015
Identified intangible assets:
Gross amount	$	402,614	$	415,261
Accumulated amortization		(201,164)		(187,360)
Net	$	201,450	$	227,901
Identified intangible liabilities (included in deferred revenue):
Gross amount	$	587,157	$	643,488
Accumulated amortization		(310,685)		(325,340)
Net	$	276,472	$	318,148

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)
2017	$	45,591
2018		44,331
2019		32,168
2020		23,342
2021		18,159

Other Identified Intangible Assets [Member]

Finite-Lived Intangible Assets [Line Items]

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

Estimated annual amortization of all other identified intangible assets including acquired in-place leases, customer relationships, and third party contracts for each of the five succeeding years commencing January 1, 2017 is as follows:

(Amounts in thousands)
2017	$	24,502
2018		20,251
2019		15,912
2020		12,441
2021		11,209

Tenant Under Ground Leases [Member]

Finite-Lived Intangible Assets [Line Items]

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

Estimated annual amortization of these below-market leases, net of above-market leases, for each of the five succeeding years commencing January 1, 2017 is as follows:

(Amounts in thousands)
2017	$	1,832
2018		1,832
2019		1,832
2020		1,832
2021		1,832