Commitments and Contingencies - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) ft² ShoppingCenter	Mar. 31, 2017 USD ($)	Apr. 24, 2018 Store	Dec. 31, 2017 USD ($)
Contingencies And Commitments [Line Items]
Casualty insurance receivable	$ 65,547			$ 58,583
Insurance proceeds related to business interruption insurance claims	$ 2,000	$ 0
Puerto Rico [Member]
Contingencies And Commitments [Line Items]
Number of properties owned | ShoppingCenter	12
Gross leasable area of properties owned | ft²	4,400,000
Gross leasable area of anchor spaces | ft²	25,000
Insurance Policy Limit	$ 330,000
Hurricane casualty and impairment loss	$ 6,000
Puerto Rico [Member] | Loss from Catastrophes
Contingencies And Commitments [Line Items]
Number of assets sustained varying degrees of damage | ShoppingCenter	11
Estimated net book value of the property damage written off	$ 76,700
Casualty insurance receivable	$ 65,500
Business interruption insurance coverage period after restoration	365 days
Rental revenues lost and not recognized	$ 3,800
Puerto Rico [Member] | Loss from Catastrophes | Business Interruption Income [Member]
Contingencies And Commitments [Line Items]
Insurance proceeds related to business interruption insurance claims	$ 2,000
Puerto Rico [Member] | Loss from Catastrophes | Subsequent Event [Member]
Contingencies And Commitments [Line Items]
Percentage of tenants opened in anchor space properties post hurricanes			82.00%
Number of stores opened in anchor space properties post hurricanes | Store			27
Percentage of leased gross leasable area opened in anchor space properties post hurricanes			85.00%
Puerto Rico [Member] | Loss from Catastrophes | Plaza Palma Real [Member]
Contingencies And Commitments [Line Items]
Number of properties owned that was severely damaged | ShoppingCenter	1
Gross leasable area of properties owned that was severely damaged | ft²	400,000
Puerto Rico [Member] | Loss from Catastrophes | Plaza Palma Real [Member] | Subsequent Event [Member]
Contingencies And Commitments [Line Items]
Percentage of leased gross leasable area opened in anchor space properties post hurricanes			81.00%
Puerto Rico [Member] | Loss from Catastrophes | Sam's Club [Member]
Contingencies And Commitments [Line Items]
Number of stores opened in anchor space properties post hurricanes | Store			1
Puerto Rico [Member] | Loss from Catastrophes | Home Depot [Member]
Contingencies And Commitments [Line Items]
Number of stores opened in anchor space properties post hurricanes | Store			2
Puerto Rico [Member] | Loss from Catastrophes | Sears/Kmart [Member]
Contingencies And Commitments [Line Items]
Number of stores opened in anchor space properties post hurricanes | Store			3
Puerto Rico [Member] | Loss from Catastrophes | Other Grocery Stores [Member]
Contingencies And Commitments [Line Items]
Number of stores opened in anchor space properties post hurricanes | Store			5
Puerto Rico [Member] | Loss from Catastrophes | Walmart [Member]
Contingencies And Commitments [Line Items]
Number of stores opened in anchor space properties post hurricanes | Store			7