Schedule of Other Assets (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Other Assets [Line Items]
Below market lease value, accumulated amortization	$ 8,850	$ 6,920
Deferred leasing assets, accumulated amortization	2,021	276
Debt issuance costs, accumulated amortization	631	2,711
Other intangible assets
Schedule of Other Assets [Line Items]
Intangible assets, accumulated amortization	$ 5,118	$ 2,349