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Deferred Charges (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Deferred lease costs and other intangibles, gross | $ 290,940 | $ 307,366
Accumulated amortization | (174,066) | (175,305)
Deferred lease costs and other intangibles, net | 116,874 | 132,061
Deferred Lease Costs [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Deferred lease costs and other intangibles, gross | 87,590 | 81,888
Above market lease value [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Deferred lease costs and other intangibles, gross | 49,869 | 54,763
Lease in place value [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Deferred lease costs and other intangibles, gross | 64,152 | 71,801
Tenant Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Deferred lease costs and other intangibles, gross | 40,690 | 49,184
Other Intangible Assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Deferred lease costs and other intangibles, gross | $ 48,639 | $ 49,730

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