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Organization - Additional Information (Detail) | Sep. 30, 2021 a property
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Number of properties in greater New York City metropolitan area (property) | property | 7
Area of land (in acres) | a | 30.3

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- Definition Area of land held. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
Balance Type: | na
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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