Lease Intangible Assets and Liabilities - Summary of Lease Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Asset	$ 39,377	$ 77,308
Accumulated Amortization	(21,675)	(58,713)
Balance	17,702	18,595
In-Place Leases, Net [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Asset	35,452	73,169
Accumulated Amortization	(19,448)	(56,369)
Balance	16,004	16,800
Above-Market Leases, Net [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Asset	3,925	4,139
Accumulated Amortization	(2,227)	(2,344)
Balance	$ 1,698	$ 1,795