Investments in Unconsolidated Entities - Summary of Company's Investments in Unconsolidated Entities (Detail)	6 Months Ended
	Jun. 30, 2025 ft² Property
Income Statement Equity Method Investments [Line Items]
Number of Properties	5
Total GLA | ft²	251,200
Brookfield Properties Retail II [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	50.00%
Number of Properties	1
Total GLA | ft²	93,500
Invesco Real Estate [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	50.00%
Number of Properties	1
Total GLA | ft²	51,500
Invesco Real Estate II [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	50.00%
Number of Properties	1
Total GLA | ft²	106,200
RD Management [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	50.00%
Number of Properties	1
The Howard Hughes Corporation and Foulger-Pratt [Member]
Income Statement Equity Method Investments [Line Items]
Seritage % Ownership	31.30%
Number of Properties	1