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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, 2020 | Dec. 31, 2019
Real Estate [Abstract] |  |
Estimated Amortization Expense, 2021 | $ 664 |
Estimated Amortization Expense, 2022 | 623 |
Estimated Amortization Expense, 2023 | 589 |
Estimated Amortization Expense, 2024 | 523 |
Estimated Amortization Expense, 2025 | 438 |
Estimated Amortization Expense, Thereafter | 895 |
Estimated Amortization Expense | 3,732 | $ 4,827
Estimated Net Increase (Decrease) to Lease Revenue, 2021 | (26) |
Estimated Net Increase (Decrease) to Lease Revenue, 2022 | 43 |
Estimated Net Increase (Decrease) to Lease Revenue, 2023 | 35 |
Estimated Net Increase (Decrease) to Lease Revenue, 2024 | 25 |
Estimated Net Increase (Decrease) to Lease Revenue, 2025 | 25 |
Estimated Net Increase (Decrease) to Lease Revenue, Thereafter | 316 |
Estimated Net Increase (Decrease) to Lease Revenue | $ 418 |

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