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Fair Value Measurements - Schedule of Carrying Values and Estimated Fair Values of Financial Instruments (Details) - Mortgages - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | $ 457,662 | $ 493,819
Fair Value | BOA II Loan | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 220,730 | 226,361
Fair Value | AIG Loan II | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 115,340 | 111,872
Fair Value | AIG Loan | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 92,444 | 89,526
Fair Value | Samsonite Loan | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 0 | 17,998
Fair Value | HealthSpring Mortgage Loan | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 0 | 19,107
Fair Value | Pepsi Bottling Ventures | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 17,439 | 17,014
Fair Value | Highway 94 Mortgage Loan | Fair Value, Inputs, Level 2 |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 11,709 | 11,941
Carrying Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 491,545 | 539,803
Carrying Value | BOA II Loan |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 250,000 | 250,000
Carrying Value | AIG Loan II |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 119,953 | 122,328
Carrying Value | AIG Loan |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 92,444 | 99,794
Carrying Value | Samsonite Loan |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 0 | 17,998
Carrying Value | HealthSpring Mortgage Loan |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 0 | 19,107
Carrying Value | Pepsi Bottling Ventures |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | 17,439 | 17,836
Carrying Value | Highway 94 Mortgage Loan |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Mortgage loans | $ 11,709 | $ 12,740

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