Investments in Unconsolidated Joint Ventures - Summary of Financial Information of Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Equity Method Investments And Joint Ventures [Abstract]
Real estate, net	$ 1,463,668		$ 1,463,668		$ 1,236,989
Intangible assets, net	97,811		97,811		97,658
Other assets	95,058		95,058		91,552
Total assets	1,656,537		1,656,537		1,426,199
Notes and mortgages payable, net	1,022,881		1,022,881		887,882
Intangible liabilities, net	5,277		5,277
Other liabilities	26,542		26,542		22,310
Total liabilities	1,054,700		1,054,700		910,192
Equity	601,837		601,837		516,007
Total liabilities and equity	1,656,537		1,656,537		$ 1,426,199
Rental revenue	36,455	$ 35,206	74,679	$ 71,041
Fee and other income	393	167	491	303
Total revenues	36,848	35,373	75,170	71,344
Operating expenses	15,274	13,078	29,677	26,605
Depreciation and amortization	15,082	12,032	29,207	24,193
Total expenses	30,356	25,110	58,884	50,798
Interest and other income, net	201	198	299	368
Interest and debt expense	(12,323)	(9,733)	(23,850)	(18,912)
Net (loss) income before income taxes	(5,630)	728	(7,265)	2,002
Income tax expense			(8)	(10)
Net (loss) income	$ (5,630)	$ 728	$ (7,273)	$ 1,992