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Intangible Assets and Below Market Lease Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Assets: |  |  |  |  |
Deferred leasing costs (including lease incentives and above market lease and in-place lease acquisition-related intangible assets) | $ 344,067 |  | $ 344,067 |  | $ 344,548
Deferred leasing costs, accumulated amortization | (148,019) |  | (148,019) |  | (149,275)
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 196,048 |  | 196,048 |  | 195,273
Liabilities (in accounts payable, accrued expenses and other liabilities): |  |  |  |  |
Acquisition-related below market lease liabilities, gross | 53,861 |  | 53,861 |  | 57,955
Acquisition-related below market lease liabilities, accumulated amortization | (33,285) |  | (33,285) |  | (32,307)
Acquisition-related below market lease liabilities, net | 20,576 |  | 20,576 |  | $ 25,648
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 | 181,470 |  | 181,470 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 9,003 | $ 8,969 | 28,077 | $ 27,671 |
Lease Incentives (in Rental and Other Revenues) [Member] |  |  |  |  |
Assets: |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 10,214 |  | 10,214 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 540 | 452 | 3,848 | 1,357 |
Acquisition-Related Intangible Assets (in Rental and Other Revenues) [Member] |  |  |  |  |
Assets: |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 3,713 |  | 3,713 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 305 | 415 | 1,005 | 1,292 |
Acquisition-Related Intangible Assets (in Rental Property and Other Expenses) [Member] |  |  |  |  |
Assets: |  |  |  |  |
Deferred leasing costs, net/Total scheduled future amortization of intangible assets | 651 |  | 651 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of intangible assets | 140 | 140 | 416 | 416 |
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 | 20,576 |  | 20,576 |  |
Amortization of intangible assets and below market lease liabilities [Abstract] |  |  |  |  |
Amortization of acquisition-related below market lease liabilities | $ (1,656) | $ (1,535) | $ (5,072) | $ (4,553) |

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