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Real Estate and Intangible Assets - Carrying Value of Lease Intangible Assets or Liabilities in Other Assets and Other Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Above-market lease values and lease incentives |  |
Finite-Lived Intangible Assets [Line Items] |  |
Lease intangibles | $ 255 | $ 111
Accumulated amortization | (135) | (41)
Below-market lease values and deferred revenue |  |
Finite-Lived Intangible Assets [Line Items] |  |
Below-market lease values, gross | (943) | (886)
Below-market lease values, accumulated (amortization) accretion | 335 | 257
Market leases, net |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets (liability) gross | (688) | (775)
Finite-lived intangible asset, accumulated (amortization) accretion | $ 200 | $ 216

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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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