Other Assets, net - Components of Other Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Intangible assets:
Total intangible assets, net	$ 46,742	$ 58,021
Operating lease ROU assets	21,024	21,792
Notes receivable	0	7,541	$ 19,670
Other assets:
Prepaid expenses	7,414	6,104
Other assets	2,372	2,959
Deposits	3,855	4,087
Deferred charges, net	6,634	8,127
Total other assets, net	88,041	108,631
Below-market leases, net (other liabilities)	43,205	46,961
In-Place Leases, Net [Member]
Intangible assets:
Total intangible assets, net	19,784	25,114
Above-Market Leases, Net [Member]
Intangible assets:
Total intangible assets, net	2,495	3,193
Lease Origination Costs [Member]
Intangible assets:
Total intangible assets, net	2,857	3,720
Tenant Relationships, Net [Member]
Intangible assets:
Total intangible assets, net	$ 21,606	$ 25,994