Other Assets, Net - Components of Other Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Intangible assets:
Total intangible assets, net	$ 88,752	$ 182,407
Other assets:
Prepaid expenses	7,286	10,806
Other assets	4,593	3,869
Deposits	4,845	5,076
Deferred charges, net	6,300	7,901
Total other assets, net	111,776	210,059
In-Place Leases, Net [Member]
Intangible assets:
Total intangible assets, net	32,087	71,809
Above-Market Leases, Net [Member]
Intangible assets:
Total intangible assets, net	7,739	14,391
Lease Origination Costs [Member]
Intangible assets:
Total intangible assets, net	4,395	10,029
Tenant Relations, Net [Member]
Intangible assets:
Total intangible assets, net	$ 44,531	$ 86,178