Acquisitions - Schedule of Company Acquired Shopping Centers (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Shoppes at Addison Place [Member] | Delray Beach, Florida [Member]
Business Acquisition [Line Items]
Date Acquired		2021-05
Purchase Price		$ 40.0
Face Value of Mortgage Debt Assumed		$ 17.9
Emmet Street Station [Member] | Charlottesville, Virginia [Member]
Business Acquisition [Line Items]
Date Acquired		2021-05
Purchase Price		$ 8.8
Face Value of Mortgage Debt Assumed		$ 0.0
Hammond Springs [Member] | Atlanta, Georgia [Member]
Business Acquisition [Line Items]
Date Acquired		2021-09
Purchase Price		$ 31.0
Face Value of Mortgage Debt Assumed		$ 0.0
Emmet Street North [Member] | Charlottesville, Virginia [Member]
Business Acquisition [Line Items]
Date Acquired		2021-12
Purchase Price		$ 3.9
Face Value of Mortgage Debt Assumed		$ 0.0
At Home Single Box [Member] | Princeton New Jersey [Member]
Business Acquisition [Line Items]
Date Acquired		2021-12
Purchase Price		$ 15.8
Face Value of Mortgage Debt Assumed		$ 0.0
Belgate Shopping Center Land Parcel [Member] | Charlotte North Carolina [Member]
Business Acquisition [Line Items]
Date Acquired		2021-11
Purchase Price		$ 1.1
Face Value of Mortgage Debt Assumed		$ 0.0
Concourse Village [Member] | Jupiter, Florida [Member]
Business Acquisition [Line Items]
Date Acquired			2020-10
Purchase Price	[1]		$ 0.0
Face Value of Mortgage Debt Assumed			$ 13.0
Village Square At Golf [Member] | Boynton Beach Florida [Member]
Business Acquisition [Line Items]
Date Acquired		2021-12
Purchase Price	[2]	$ 0.0
Face Value of Mortgage Debt Assumed	[2]	$ 0.0
Millenia Crossing [Member] | Orlando, Florida [Member]
Business Acquisition [Line Items]
Date Acquired			2020-10
Purchase Price	[1]		$ 0.0
Face Value of Mortgage Debt Assumed			$ 20.7
Shoppes At Paradise Point [Member] | Fort Walton Beach Florida [Member]
Business Acquisition [Line Items]
Date Acquired		2021-12
Purchase Price	[2]	$ 0.0
Face Value of Mortgage Debt Assumed	[2]	$ 0.0
Echelon Village Plaza [Member] | Voorhees, New Jersey [Member]
Business Acquisition [Line Items]
Date Acquired			2020-10
Purchase Price	[1]		$ 0.0
Face Value of Mortgage Debt Assumed			$ 5.4
Midway Plaza [Member] | Tamarac Florida [Member]
Business Acquisition [Line Items]
Date Acquired		2021-12
Purchase Price	[2]	$ 0.0
Face Value of Mortgage Debt Assumed	[2]	$ 0.0
The Hub [Member] | Hempstead, New York [Member]
Business Acquisition [Line Items]
Date Acquired			2020-10
Purchase Price	[1]		$ 0.0
Face Value of Mortgage Debt Assumed			$ 28.0
North Point Plaza [Member] | Tampa Florida [Member]
Business Acquisition [Line Items]
Date Acquired		2021-12
Purchase Price	[2]	$ 0.0
Face Value of Mortgage Debt Assumed	[2]	$ 0.0
Larkins Corner [Member] | Boothwyn, Pennsylvania [Member]
Business Acquisition [Line Items]
Date Acquired			2020-10
Purchase Price	[1]		$ 0.0
Face Value of Mortgage Debt Assumed			$ 16.4
The Shoppes At New Tampa [Member] | Wesley Chapel Florida [Member]
Business Acquisition [Line Items]
Date Acquired		2021-12
Purchase Price	[2]	$ 0.0
Face Value of Mortgage Debt Assumed	[2]	$ 0.0
Ashbridge Square [Member] | Downingtown, Pennsylvania [Member]
Business Acquisition [Line Items]
Date Acquired			2020-10
Purchase Price	[1]		$ 0.0
Face Value of Mortgage Debt Assumed			$ 32.4
Paradise Shoppes Of Ellenwood [Member] | Ellenwood Georgia [Member]
Business Acquisition [Line Items]
Date Acquired		2021-12
Purchase Price	[2]	$ 0.0
Face Value of Mortgage Debt Assumed	[2]	$ 0.0
Southmont Plaza [Member] | Easton, Pennsylvania [Member]
Business Acquisition [Line Items]
Date Acquired			2020-10
Purchase Price	[1]		$ 0.0
Face Value of Mortgage Debt Assumed			$ 30.7
Paradise Village Gateway [Member] | Phoenix Arizona [Member]
Business Acquisition [Line Items]
Date Acquired		2021-12
Purchase Price	[3]	$ 0.0
Face Value of Mortgage Debt Assumed		$ 0.0
Midtowne Park [Member] | Anderson, South Carolina [Member]
Business Acquisition [Line Items]
Date Acquired			2020-11
Purchase Price	[4]		$ 0.0
Face Value of Mortgage Debt Assumed			$ 15.7
White Oak Village [Member] | Richmond, Virginia [Member]
Business Acquisition [Line Items]
Date Acquired			2020-11
Purchase Price	[4]		$ 0.0
Face Value of Mortgage Debt Assumed			$ 34.3

[1] Acquired from the DDR BRE IV joint venture. The purchase price is equal to the estimated fair value of the properties plus transaction costs incurred.

[2] Acquired 80% interest from the DDRM Properties Joint Venture.  The purchase price of $134.0 million at 100% (or $107.2 million at 80%) is equal to the estimated fair value of the properties plus transaction costs incurred.  Mortgage debt of $73.9 million was repaid at closing (Note 3).

[3] Acquired its partner’s 33% interest in a consolidated joint venture, Paradise Village Gateway.  The partner’s 33% ownership was previously reflected as non-controlling interest on the Company’s balance sheet. The Company repaid the mortgage debt of $27.6 million at closing.

[4] Acquired from the DDR BRE III joint venture.  The purchase price is equal to the estimated fair value of the properties plus transaction costs incurred.