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Subsequent Events - Additional Information (Detail)		1 Months Ended	12 Months Ended
	Dec. 14, 2017 Shoppingcenter	Feb. 28, 2018 USD ($) ShoppingCenter Option	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Subsequent Event [Line Items]
Mortgage indebtedness			$ 641,082,000	$ 982,509,000
Number of shopping centers the company intended to spinoff | Shoppingcenter	50
Repayment of outstanding mortgage debt			542,486,000	195,495,000	$ 1,068,924,000
Debt instrument, tendered amount			958,509,000	240,000,000	$ 502,996,000
U.S. [Member]
Subsequent Event [Line Items]
Number of shopping centers the company intended to spinoff | Shoppingcenter	38
Puerto Rico [Member]
Subsequent Event [Line Items]
Mortgage indebtedness			263,400,000
Number of shopping centers the company intended to spinoff | Shoppingcenter	12
Mortgages indebtedness [Member]
Subsequent Event [Line Items]
Mortgage indebtedness			$ 641,100,000	$ 982,500,000
Unsecured Senior Notes [Member]
Subsequent Event [Line Items]
Debt Instrument Maturity Date, Start			2018-07
Debt Instrument Maturity Date, End			2027-06
Subsequent Event [Member] | Mortgages indebtedness [Member]
Subsequent Event [Line Items]
Mortgage indebtedness		$ 1,350,000,000
Number of shopping centers the company intended to spinoff | ShoppingCenter		50
Interest rate description		bears interest at an initial annual rate of one-month LIBOR plus 330 basis points
Term loan maturity date		2021-02
Debt instrument number of extension options | Option		2
Debt instrument extension options maturity period		1 year
Repayment of outstanding mortgage debt		$ 452,500,000
Subsequent Event [Member] | Mortgages indebtedness [Member] | U.S. [Member]
Subsequent Event [Line Items]
Number of shopping centers the company intended to spinoff | ShoppingCenter		38
Subsequent Event [Member] | Mortgages indebtedness [Member] | Puerto Rico [Member]
Subsequent Event [Line Items]
Number of shopping centers the company intended to spinoff | ShoppingCenter		12
Subsequent Event [Member] | Mortgages indebtedness [Member] | Interest rate cap [Member]
Subsequent Event [Line Items]
Derivative, notional amount		$ 1,350,000,000
Derivative cap interest rate		3.00%
Subsequent Event [Member] | Mortgages indebtedness [Member] | LIBOR [Member]
Subsequent Event [Line Items]
Specified spread line of credit facility		3.30%
Subsequent Event [Member] | Unsecured Senior Notes [Member]
Subsequent Event [Line Items]
Debt instrument, tendered amount		$ 856,500,000
Debt Instrument Maturity Date, Start		2018-07
Debt Instrument Maturity Date, End		2025-02

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