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Real Estate Dispositions, Held for Sale, and Impairment Charges - Components of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Assets Held for Sale |  |  |
Total Assets Held for Sale | $ 3,990 | $ 4,151 |
Liabilities Held for Sale |  |  |
Total Liabilities Held for Sale | 21 | 0 |
Real Estate Held For Sale |  |  |
Assets Held for Sale |  |  |
Real estate, at cost | 7,411 | 3,173 | $ 13,000
Less: accumulated depreciation | 3,421 | 218 | $ 4,000
Total real estate held for sale, net | 3,990 | 2,955 |
Lease intangibles, net | 0 | 1,105 |
Deferred rent receivable, net | 0 | 91 |
Total Assets Held for Sale | 3,990 | 4,151 |
Liabilities Held for Sale |  |  |
Asset retirement obligation | 21 | 0 |
Total Liabilities Held for Sale | $ 21 | $ 0 |

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