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Deferred Leasing Costs and Acquisition-Related Intangible Assets and Liabilities, net - Deferred Leasing Costs and Acquisition-related Intangible Assets and Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net |  |
Total deferred leasing costs and acquisition-related intangible assets, net | $ 210,949 | $ 212,805
Acquisition-related Intangible Liabilities, Net [Abstract] |  |
Total acquisitions-related intangible liabilities, net | 13,345 | 24,092
Deferred leasing costs [Member] |  |
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net |  |
Finite-lived intangible assets/liabilities, gross | 300,556 | 286,026
Accumulated amortization | (104,277) | (100,145)
Finite-lived intangible assets | 196,279 | 185,881
Above market leases [Member] |  |
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net |  |
Finite-lived intangible assets/liabilities, gross | 0 | 611
Accumulated amortization | 0 | (116)
Finite-lived intangible assets | 0 | 495
In-place leases [Member] |  |
Deferred Leasing Costs and Acquisition-related Intangible Assets and Liabilities, Net |  |
Finite-lived intangible assets/liabilities, gross | 40,323 | 58,076
Accumulated amortization | (25,653) | (31,647)
Finite-lived intangible assets | 14,670 | 26,429
Below-market operating leases [Member] |  |
Acquisition-related Intangible Liabilities, Net [Abstract] |  |
Acquisition-related intangible liabilities, gross | 26,405 | 51,263
Accumulated amortization | (13,060) | (27,171)
Acquisition-related intangible liabilities, net | $ 13,345 | $ 24,092

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- Definition The identifiable intangible liability established upon acquisition based on an unfavorable difference between the terms of an acquired lease and the current market terms for that lease at the acquisition date and the ground lease obligation established upon acquisition based on an unfavorable difference between the terms of the acquired ground lease and the current market terms for that lease at the acquisition date. + References No definition available. + Details
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- Definition Acquisition-related Intangible Liabilities, Net [Abstract] + References No definition available. + Details
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- Definition Deferred Leasing Costs and Acquisition-related Intangible Assets. + References No definition available. + Details
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- Definition This element represents (1) costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction; (2) the identifiable intangible asset established upon acquisition based on a favorable difference between the terms of an acquired lease and the current market terms for that lease at the acquisition date; and (3) the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. This element is net of accumulated amortization. + References No definition available. + Details
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- Definition Accumulated amount of amortization of intangible liabilities with a finite life. + References No definition available. + Details
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- Definition Amount before amortization of intangible liabilities with a finite life. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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