Investments in Unconsolidated Joint Ventures - Summary of Combined Condensed Financial Data of Unconsolidated Joint Ventures (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Dec. 31, 2015
ASSETS
Land	$ 214,109		$ 214,109	$ 214,726
Buildings and improvements	600,642		600,642	603,265
Accumulated depreciation	(48,256)		(48,256)	(24,111)
Investment in real estate, gross	766,495		766,495	793,880
Construction in progress	6,740		6,740	1,481
Net investment in real estate	773,235		773,235	795,361
Cash and cash equivalents	22,743		22,743	19,903
Tenant and other receivables, net	5,088		5,088	4,990
Other assets, net	16,019		16,019	30,506
Total assets	817,085		817,085	850,760
LIABILITIES AND EQUITY
Accounts payable, accrued expenses and other liabilities	11,761		11,761	13,973
Total liabilities	11,761		11,761	13,973
Equity
Additional paid in capital	796,334		796,334	823,923
Retained earnings	8,990		8,990	12,864
Total equity	805,324		805,324	836,787
Total liabilities and equity	817,085		817,085	$ 850,760
Total revenue	16,266	$ 16,932	50,113
Property operating expenses	(3,103)	(4,208)	(9,703)
Depreciation and amortization	(10,382)	(7,133)	(31,304)
Operating income	2,781	5,591	9,106
Other expenses	212	(151)	(117)
Net income	2,993	5,440	8,989
Equity in income of unconsolidated joint ventures	$ 1,497	$ 2,720	$ 4,495