Fair Value Measurements - Summary of Carrying Amounts and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
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