Intangible Assets - Summary of Amortization or Accretion Recorded During the Period Related to Acquired Lease Intangibles (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Acquired Finite Lived Intangible Assets [Line Items]
Amortization of (below) above market lease intangibles, net			$ (318)	$ 56
In-place lease intangibles
Acquired Finite Lived Intangible Assets [Line Items]
Amortization of in-place lease intangibles	$ 3,149	$ 3,402	6,105	6,288
Net above (below) market tenant leases
Acquired Finite Lived Intangible Assets [Line Items]
Amortization of (below) above market lease intangibles, net	(193)	67	(302)	72
Above-market ground lease
Acquired Finite Lived Intangible Assets [Line Items]
Accretion of above-market ground lease intangibles	$ (8)	$ (8)	$ (16)	$ (16)