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Commitments and Contingencies - Summary of Partnership's Maximum Exposure Under Guaranty Agreements (Details)	9 Months Ended
	Sep. 30, 2024 USD ($)
Ohio Properties [Member]
Long-term Purchase Commitment [Line Items]
Partnership's Maximum Exposure as of September 30, 2024	$ 1,960,152
End of Guaranty Period	2026
Greens of Pine Glen [Member]
Long-term Purchase Commitment [Line Items]
Partnership's Maximum Exposure as of September 30, 2024	$ 1,470,582
End of Guaranty Period	2027

X

- Definition

Year Of Guarantee Agreement Term Ending .

+ References

No definition available.

+ Details

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Namespace Prefix:	ghi_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Definition

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.

+ References

No definition available.

+ Details

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- Details

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Namespace Prefix:
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X

- Details

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