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Investments in and Advances to Unconsolidated Affiliates - Mervyns I & II - Additional Information (Details) - USD ($) $ in Thousands, shares in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 | Jun. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2020
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Cost method investments effective ownership interest |  |  |  |  |  | 1.00%
Net unrealized holding gains on investments |  |  | $ 51,925 | $ 72,391 | $ 0 |
Mervyns II |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Cost method investment, ownership percentage |  |  | 28.33% |  |  |
Proceeds from Dividends Received |  |  | $ 1,700 |  |  |
Unrealized change in fair value of investment |  |  | $ 51,900 |  |  |
Realized gain on investment | $ 400 | $ 22,800 |  |  |  |
Cost method investments effective ownership, shares |  |  | 4.1 |  |  | 4.1
Cost method investments effective ownership interest |  |  | 1.00% |  |  |
Net unrealized holding gains on investments |  | $ 64,900 |  |  |  |
Albertson |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Cost method investment, ownership percentage |  |  | 36.67% |  |  |
Net unrealized holding gains on investments |  |  |  | $ 7,500 |  |
Albertson | Mervyns II |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Net unrealized holding gains on investments |  |  | $ 1,700 |  |  |

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