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Identified Intangible Assets and Liabilities (Tables)
12 Months Ended
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]  
Schedule of Identified Intangible Assets and Intangible Liabilities

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

(Amounts in thousands) Balance as of December 31,
20162015
Identified intangible assets:
Gross amount$400,061$415,261
Accumulated amortization(207,330)(187,360)
Net$192,731$227,901
Identified intangible liabilities (included in deferred revenue):
Gross amount$586,969$643,488
Accumulated amortization(323,183)(325,340)
Net$263,786$318,148
Below Market Leases Net Of Above Market Leases  
Finite-Lived Intangible Assets [Line Items]  
Schedule of future amortization expense of intangible assets
(Amounts in thousands)
2017$45,576
201844,346
201932,168
202023,343
202118,159
Other Identified Intangible Assets  
Finite-Lived Intangible Assets [Line Items]  
Schedule of future amortization expense of intangible assets
(Amounts in thousands)
2017$24,456
201820,201
201915,863
202012,394
202111,177
Tenant Under Ground Leases  
Finite-Lived Intangible Assets [Line Items]  
Schedule of future amortization expense of intangible assets
(Amounts in thousands)
2017$1,832
20181,832
20191,832
20201,832
20211,832