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Real Estate and Intangible Assets - Summary of Estimated Aggregate Amortization Expense and Estimated Net Impact on Rental Income (Detail) - USD ($) $ in Thousands | 12 Months Ended |
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Dec. 31, 2019 | Dec. 31, 2018
Real Estate [Abstract] |  |
Estimated Amortization Expense, 2020 | $ 1,374 |
Estimated Amortization Expense, 2020 | 1,062 |
Estimated Amortization Expense, 2021 | 780 |
Estimated Amortization Expense, 2022 | 692 |
Estimated Amortization Expense, 2023 | 624 |
Estimated Amortization Expense, Thereafter | 295 |
Estimated Amortization Expense | 4,827 | $ 5,686
Estimated Net Increase in Rental Revenue, 2020 | 137 |
Estimated Net Increase in Rental Revenue, 2020 | 113 |
Estimated Net Increase in Rental Revenue, 2021 | 115 |
Estimated Net Increase in Rental Revenue, 2022 | 108 |
Estimated Net Increase in Rental Revenue, 2023 | 89 |
Estimated Net Increase in Rental Revenue, Thereafter | (3) |
Estimated Net Increase to Rental Income | $ 559 |

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