Investments in Unconsolidated Joint Ventures - Summary of Combined Condensed Financial Data of Unconsolidated Joint Ventures (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
ASSETS
Land	$ 329,349		$ 329,349		$ 321,853
Buildings and improvements	521,784		521,784		508,302
Accumulated depreciation	(77,514)		(77,514)		(72,239)
Investment in real estate, gross	773,619		773,619		757,916
Construction in progress	98,135		98,135		78,227
Net investment in real estate	871,754		871,754		836,143
Cash and cash equivalents	21,126		21,126		14,741
Tenant and other receivables, net	6,679		6,679		5,220
Other assets, net	21,633		21,633		38,285
Total assets	921,192		921,192		894,389
LIABILITIES AND MEMBERS' INTERESTS
Mortgage loans payable, net	13,989		13,989		10,406
Accounts payable, accrued expenses and other liabilities	59,557		59,557		71,791
Total liabilities	73,546		73,546		82,197
Additional paid in capital	865,160		865,160		833,168
Retained earnings	(17,514)		(17,514)		(20,976)
Total members interest	847,646		847,646		812,192
Total liabilities and members interest	921,192		921,192		$ 894,389
Total revenue	8,968	$ 12,116	20,186	$ 23,343
Property operating expenses	(2,898)	(2,103)	(5,496)	(3,815)
Depreciation and amortization	(25,510)	(7,030)	(30,763)	(14,616)
Operating income	(19,440)	2,983	(16,073)	4,912
Other expenses	(448)	(7,298)	(1,370)	(14,392)
Net (loss) income	(19,888)	(4,315)	(17,443)	(9,480)
Equity in (loss) income of unconsolidated joint ventures	$ (9,944)	$ (2,158)	$ (8,722)	$ (4,740)