XML 130 R120.htm IDEA: XBRL DOCUMENT
v3.23.1

Commitments and Contingencies - Summary of Partnership's Maximum Exposure Under Guaranty Agreements (Details) | 3 Months Ended
--- | ---
Mar. 31, 2023 USD ($)
The 50/50 MF Property--TIF Loan [Member] |
Long-term Purchase Commitment [Line Items] |
Partnership's Maximum Exposure as of September 30, 2022 | $ 1,809,510
End of Guaranty Period | 2025
The 50/50 MF Property--Mortgage [Member] |
Long-term Purchase Commitment [Line Items] |
Partnership's Maximum Exposure as of September 30, 2022 | $ 22,280,901
End of Guaranty Period | 2027
Ohio Properties [Member] |
Long-term Purchase Commitment [Line Items] |
Partnership's Maximum Exposure as of September 30, 2022 | $ 2,310,609
End of Guaranty Period | 2026
Greens of Pine Glen [Member] |
Long-term Purchase Commitment [Line Items] |
Partnership's Maximum Exposure as of September 30, 2022 | $ 1,662,397
End of Guaranty Period | 2027

X
- Definition Year Of Guarantee Agreement Term Ending . + References No definition available. + Details
Name: | ghi_YearOfGuaranteeAgreementTermEnding
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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI https://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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
Name: | us-gaap_LongTermPurchaseCommitmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=ghi_The5050MfPropertyTifLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=ghi_The5050MfPropertyMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=ghi_OhioPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=ghi_GreensOfPineGlenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |