XML 81 R73.htm IDEA: XBRL DOCUMENT
v3.25.1

Governmental Issuer Loans - Additional Information (Details) | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Feb. 28, 2025 USD ($) | Jan. 31, 2025 USD ($) | Feb. 29, 2024 USD ($) | Mar. 31, 2025 USD ($) Entities Property | Dec. 31, 2024 USD ($) Property
Governmental Issuer Loans [Line Items] |  |  |  |  |
Number of Variable Interest Entities | Property |  |  |  | 24 | 31
Governmental Issuer Loans [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Accrued interest receivable |  |  |  | $ 1,000,000 | $ 1,400,000
Number of Variable Interest Entities | Entities |  |  |  | 2 |
Outstanding principal |  |  |  | $ 46,700,000 |
Property Loans [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Outstanding principal |  |  |  | 1,600,000 |
Poppy Grove GILs [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Outstanding principal |  |  |  | 108,200,000 |
Poppy Grove taxable GILs [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Outstanding principal |  |  |  | $ 22,200,000 |
Poppy Grove I [Member] | Governmental Issuer Loans [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Borrower | $ 5,200,000 |  |  |  |
Poppy Grove II [Member] | Governmental Issuer Loans [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Borrower | 1,800,000 |  |  |  |
Poppy Grove III [Member] | Governmental Issuer Loans [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Borrower | 5,700,000 |  |  |  |
Legacy Commons, Magnolia, Ospery Village, Willow Palace Apartments And Supplemental [Member] | Governmental Issuer Loans [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Partnership recognized loan fee |  | $ 87,000 | $ 87,000 |  |
Legacy Commons at Signal Hills [Member] | Governmental Issuer Loans [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Maturity date, month and year |  |  |  | 2025-08 |
Poppy Grove I, Poppy Grove II, And Poppy Grove III [Member] | Governmental Issuer Loans [Member] |  |  |  |  |
Governmental Issuer Loans [Line Items] |  |  |  |  |
Partnership recognized loan fee | $ 307,000 |  |  |  |
Maturity date, month and year | 2025-10 |  |  |  |

X
- Definition Accrued interest receivable + References No definition available. + Details
Name: | ghi_AccruedInterestReceivable
Namespace Prefix: | ghi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt Instrument, Maturity Date, Month and Year + References No definition available. + Details
Name: | ghi_DebtInstrumentMaturityDateMonthAndYear
Namespace Prefix: | ghi_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Governmental issuer loans. + References No definition available. + Details
Name: | ghi_GovernmentalIssuerLoansLineItems
Namespace Prefix: | ghi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of variable interest entities owned. + References No definition available. + Details
Name: | ghi_NumberOfVariableInterestEntities
Namespace Prefix: | ghi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Partnership recognized loan fee. + References No definition available. + Details
Name: | ghi_PartnershipRecognizedLoanFee
Namespace Prefix: | ghi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This is the principal amount outstanding for securitized loans only (across all types of loans). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (a) -Paragraph 4 -SubTopic 20 -Topic 860 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
Name: | us-gaap_PrincipalAmountOutstandingOnLoansSecuritized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, before effects of master netting arrangements, of financial assets loaned to entities in exchange for collateral and funds outstanding borrowed in the form of a financial asset repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same financial assets at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481395/860-30-55-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-7 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-7 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-7 + Details
Name: | us-gaap_SecuredBorrowingsGrossIncludingNotSubjectToMasterNettingArrangement
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ghi_GovernmentalIssuerLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ghi_PropertyLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

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