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Basis of Presentation and Significant Accounting Policies - Additional Information (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) Segment | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jan. 01, 2019 USD ($) | Feb. 29, 2016
Property Plant And Equipment [Line Items] |  |  |  |  |
Minimum percentage of taxable income distributed to shareholders | 90.00% |  |  |  |
Income tax expense | $ 312,000 | $ 3,139,000 | $ 5,177,000 |  |
Number of reportable segments | Segment | 3 |  |  |  |
ASU 2016-02 [Member] |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |
Lease term, in months |  |  |  |  | 12 months
Right-of-use asset |  |  |  | $ 4,184,000 |
Lease liability |  |  |  | $ 4,184,000 |
Taxable REIT Subsidiaries [Member] |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |
Income tax expense | $ 242,000 | 622,000 | 5,758,000 |  |
Deferred income tax expense (benefit) | $ (28,000) | $ 87,000 | $ (922,000) |  |
Minimum [Member] |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |
Estimated useful lives of the assets, years | 5 |  |  |  |
Maximum [Member] |  |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |  |
Estimated useful lives of the assets, years | 40 |  |  |  |

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