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Segments - Additional Information (Details)	9 Months Ended
	Sep. 30, 2024 Property Unit Segment Bed Security
Segment Reporting Information [Line Items]
Number of Reportable Segments | Segment	4
Affordable Multifamily Mortgage Revenue Bond Investments Segment [Member]
Segment Reporting Information [Line Items]
Number of Available for Sale Securities | Security	85
Number of Real Estate Properties | Property	2
Seniors and Skilled Nursing Mortgage Revenue Bond Investments Segment [Member]
Segment Reporting Information [Line Items]
Number of rental units financed by mortgage revenue bonds | Bed	294
Residential Properties [Member] | Affordable Multifamily Mortgage Revenue Bond Investments Segment [Member]
Segment Reporting Information [Line Items]
Number of rental units financed by mortgage revenue bonds	11,266
Number of rental units financed by tax-exempt loan	1,339

X

- Definition

Number of Available for Sale Securities

+ References

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- Definition

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+ References

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- Definition

Number of rental units financed by tax-exempt loan.

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- Definition

The number of real estate properties owned as of the balance sheet date.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
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-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-18

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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