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Fair Value Measurements - Summary of Carrying Amounts and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Total assets | $ 21,639 | $ 39,519
Total liabilities |  | 48
Carrying Amount [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Preferred equity investments |  | 36,042
Total assets |  | 36,042
Notes and mortgages payable | 3,809,643 | 3,599,800
Revolving credit facility | 36,918 |
Total liabilities | 3,846,561 | 3,599,800
Fair Value [Member] |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Preferred equity investments |  | 36,339
Total assets |  | 36,339
Notes and mortgages payable | 3,848,266 | 3,617,961
Revolving credit facility | 36,919 |
Total liabilities | $ 3,885,185 | $ 3,617,961

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