Acquired Lease Intangibles - Summary of Acquired Lease Intangible Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Acquired Finite Lived Intangible Assets [Line Items]
Acquired lease intangible assets, net	$ 36,365	$ 30,383
Acquired lease intangible liabilities, net	(9,130)	(3,387)
In-place Lease Intangibles
Acquired Finite Lived Intangible Assets [Line Items]
Acquired lease intangible assets, gross	68,234	49,265
Accumulated amortization	(37,648)	(25,107)
Acquired lease intangible assets, net	30,586	24,158
Above Market Tenant Leases
Acquired Finite Lived Intangible Assets [Line Items]
Acquired lease intangible assets, gross	10,191	9,062
Accumulated amortization	(4,412)	(2,837)
Acquired lease intangible assets, net	5,779	6,225
Below Market Tenant Leases
Acquired Finite Lived Intangible Assets [Line Items]
Acquired lease intangible liabilities, gross	(12,426)	(5,227)
Accumulated accretion	3,477	2,053
Acquired lease intangible liabilities, net	(8,949)	(3,174)
Above Market Ground Lease
Acquired Finite Lived Intangible Assets [Line Items]
Acquired lease intangible assets, net	181
Acquired lease intangible liabilities, gross	(290)	(290)
Accumulated accretion	109	77
Acquired lease intangible liabilities, net	$ (181)	$ (213)