Investments in Unconsolidated Joint Ventures - Summary of Financial Information of Unconsolidated Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Equity Method Investments And Joint Ventures [Abstract]
Real estate, net	$ 1,460,396		$ 1,236,989
Intangible assets, net	106,781		97,658
Other assets	95,031		91,552
Total assets	1,662,208		1,426,199
Notes and mortgages payable, net	1,022,931		887,882
Intangible liabilities, net	5,685
Other liabilities	23,758		22,310
Total liabilities	1,052,374		910,192
Equity	609,834		516,007
Total liabilities and equity	1,662,208		$ 1,426,199
Rental revenue	38,224	$ 35,835
Fee and other income	98	136
Total revenues	38,322	35,971
Operating expenses	14,403	13,527
Depreciation and amortization	14,125	12,161
Total expenses	28,528	25,688
Interest and other income, net	98	170
Interest and debt expense	(11,527)	(9,179)
Net (loss) income before income taxes	(1,635)	1,274
Income tax expense	(8)	(10)
Net (loss) income	$ (1,643)	$ 1,264