Other Assets - Components of Other Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Intangible assets:
Total intangible assets, net	$ 323,146	$ 389,216
Other assets:
Prepaid expenses	21,924	14,456
Other assets	21,829	39,746
Deposits	8,400	8,024
Total other assets, net	375,299	451,442
In-Place Leases (Including Lease Origination Costs and Fair Market Value of Leases) [Member]
Intangible assets:
Total intangible assets, net	134,873	160,351
Above-Market Leases, Net [Member]
Intangible assets:
Total intangible assets, net	47,722	57,199
Tenant Relations, Net [Member]
Intangible assets:
Total intangible assets, net	$ 140,551	$ 171,666