Fair Value Measurements - Summary of Carrying Amounts and Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Total assets	$ 28,569	$ 22,532
Total liabilities		22,446
Carrying Amount [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Preferred equity investments	55,294	55,051
Total assets	55,294	55,051
Notes and mortgages payable	3,526,279	3,408,179
Revolving credit facility	200,000	230,000
Total liabilities	3,726,279	3,638,179
Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Preferred equity investments	55,573	55,300
Total assets	55,573	55,300
Notes and mortgages payable	3,511,376	3,371,262
Revolving credit facility	200,018	230,018
Total liabilities	$ 3,711,394	$ 3,601,280