Other Assets, net - Components of Other Assets, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018	Sep. 30, 2018
Intangible assets:
Total intangible assets, net	$ 55,986		$ 77,419
Operating lease ROU assets	21,628	$ 22,000	0
Notes receivable	19,670		19,675	$ 19,670
Other assets:
Prepaid expenses	6,593		5,372
Other assets	4,206		3,612
Deposits	4,108		4,384
Deferred charges, net	8,625		5,767
Total other assets, net	120,816		116,229
In-Place Leases, Net [Member]
Intangible assets:
Total intangible assets, net	21,952		30,703
Above-Market Leases, Net [Member]
Intangible assets:
Total intangible assets, net	3,272		6,833
Lease Origination Costs [Member]
Intangible assets:
Total intangible assets, net	3,015		4,045
Tenant Relations, Net [Member]
Intangible assets:
Total intangible assets, net	$ 27,747		$ 35,838