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Investment in and Advances to Affiliate - Additional Information (Detail) - Retail Value Inc. [Member] - USD ($) $ in Millions |  | 1 Months Ended |
--- | --- | --- | ---
Oct. 06, 2021 | Oct. 31, 2021 | Sep. 30, 2021
Investments In And Advances To Affiliates [Line Items] |  |  |
Preferred investment |  |  | $ 190.0
Preferred stock aggregate maximum additional amounts |  |  | $ 10.0
Subsequent Event [Member] |  |  |
Investments In And Advances To Affiliates [Line Items] |  |  |
Distribution received | $ 190.0 | $ 190.0 |

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