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Intangible Assets and Below Market Lease Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Assets: |  |  |  |  |
Deferred leasing costs (including lease incentives and above market lease and in-place lease acquisition-related intangible assets) | $ 353,000 |  | $ 353,000 |  | $ 353,581
Deferred leasing costs, accumulated amortization | (147,744) |  | (147,744) |  | (140,081)
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 205,256 |  | 205,256 |  | 213,500
Liabilities (in accounts payable, accrued expenses and other liabilities): |  |  |  |  |
Acquisition-related below market lease liabilities, gross | 60,809 |  | 60,809 |  | 61,221
Acquisition-related below market lease liabilities, accumulated amortization | (25,834) |  | (25,834) |  | (23,074)
Acquisition-related below market lease liabilities, net | 34,975 |  | 34,975 |  | $ 38,147
Deferred Leasing Costs and Acquisition-Related Intangible Assets (in Depreciation and Amortization) [Member] |  |  |  |  |
Assets: |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 186,928 |  | 186,928 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 10,133 | $ 11,731 | 20,752 | $ 23,066 |
Lease Incentives (in Rental and Other Revenues) [Member] |  |  |  |  |
Assets: |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 8,818 |  | 8,818 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 443 | 390 | 840 | 1,101 |
Acquisition-Related Intangible Assets (in Rental and Other Revenues) [Member] |  |  |  |  |
Assets: |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 7,605 |  | 7,605 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 675 | 972 | 1,711 | 2,003 |
Acquisition-Related Intangible Assets (in Rental Property and Other Expenses) [Member] |  |  |  |  |
Assets: |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 1,905 |  | 1,905 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 139 | 139 | 276 | 277 |
Acquisition-Related Below Market Lease Liabilities (in Rental and Other Revenues) [Member] |  |  |  |  |
Liabilities (in accounts payable, accrued expenses and other liabilities): |  |  |  |  |
Acquisition-related below market lease liabilities, net | 34,975 |  | 34,975 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of acquisition-related below market lease liabilities | $ (1,592) | $ (2,788) | $ (3,172) | $ (4,560) |

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