Organization - Additional Information (Detail) ft² in Millions			1 Months Ended	3 Months Ended	9 Months Ended
	Nov. 04, 2022 USD ($) Property	Jul. 07, 2015 USD ($) JointVenture	Nov. 04, 2022 USD ($) Property	Mar. 31, 2022 USD ($)	Sep. 30, 2022 USD ($) ft² Property Acres Options	Sep. 30, 2021 USD ($)
Organization And Basis Of Presentation [Line Items]
Number of properties interested in the portfolio | Property					121
Non cash deferred tax benefit due to revocation of REIT status				$ 160,300,000
Net cash (used in) provided by operating activities					$ 73,547,000	$ 96,553,000
Net cash (used in) provided by investing activities					296,127,000	106,807,000
Anticipated proceeds from sale of real estate property					546,400,000
Proceeds from sale of assets					329,051,000	$ 206,170,000
Expected repayment of debt through sale of assets					$ 360,000,000
Number of put options negotiating for pricing | Options					3
Expected minimum proceeds from exercise of put options					$ 65,700,000
Minimum percentage of outstanding common stock required for affirmative vote to approve plan of sale					66.67%
Two Put Options [member]
Organization And Basis Of Presentation [Line Items]
Expected minimum proceeds from exercise of put options					$ 65,700,000
Subsequent Event [Member]
Organization And Basis Of Presentation [Line Items]
Number of assets sold | Property	12		12
Proceeds from sale of assets			$ 176,400,000
Term Loan Facility [Member]
Organization And Basis Of Presentation [Line Items]
Principal amount outstanding					$ 1,270,000,000
Debt instrument, expiration date					Jul. 31, 2023
Term Loan Facility [Member] | Subsequent Event [Member]
Organization And Basis Of Presentation [Line Items]
Principal amount outstanding	$ 1,160,000,000		1,160,000,000
Principal payment on loan			$ 110,000,000.0
Minimum [Member]
Organization And Basis Of Presentation [Line Items]
Distribution of taxable income to qualify as REIT, percent					90.00%
Contract for Sale [Member] | Subsequent Event [Member]
Organization And Basis Of Presentation [Line Items]
Number of properties | Property	10
Anticipated proceeds from sale of real estate property	$ 124,900,000
Voting and Support Agreement [Member] | Former Chairman [Member]
Organization And Basis Of Presentation [Line Items]
Percentage ownership of outstanding common shares after effect of exchange of operating partnership interest					29.00%
Contract for Sale Customer Due Diligence [Member] | Subsequent Event [Member]
Organization And Basis Of Presentation [Line Items]
Number of properties | Property	26
Anticipated proceeds from sale of real estate property	$ 421,500,000
COVID-19 Pandemic [Member]
Organization And Basis Of Presentation [Line Items]
Expected future rent, description					Company had collected 99% of
Net cash (used in) provided by operating activities					$ 73,500,000
Net cash (used in) provided by investing activities					$ 296,100,000
COVID-19 Pandemic [Member] | March 2021 [Member]
Organization And Basis Of Presentation [Line Items]
Percent of contractual rental income collected					99.00%
Sears Holdings Corporation [Member]
Organization And Basis Of Presentation [Line Items]
Business acquisition fair value, purchase price		$ 2,700,000,000
Interests in joint ventures acquired		50.00%
Number of joint venture acquired | JointVenture		3
Unconsolidated Properties [Member]
Organization And Basis Of Presentation [Line Items]
Area of real estate property (in square feet) | ft²					2.6
Number of acres held under development | Acres					313
Real Estate Investment Trust [Member]
Organization And Basis Of Presentation [Line Items]
Area of real estate property (in square feet) | ft²					16.1
Real Estate Investment Trust [Member] | Unconsolidated Properties [Member]
Organization And Basis Of Presentation [Line Items]
Area of real estate property (in square feet) | ft²					7.9
Number of acres | Acres					631
Number of properties | Property					17
Real Estate Investment Trust [Member] | Wholly Owned Properties [Member]
Organization And Basis Of Presentation [Line Items]
Area of real estate property (in square feet) | ft²					13.5
Number of wholly owned properties | Property					104