XML 114 R103.htm IDEA: XBRL DOCUMENT
v3.23.2

Debt Financing - Summary of TOB Trust Financings (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Debt Instrument [Line Items] |  |  |
Debt financing | $ 1,154,029,163 |  | $ 1,058,903,952
TOB Trust [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | 122,862,000 | $ 69,990,000 |
TOB Trust [Member] | Residency at Empire [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 14,400,000 |  |
Stated Maturity | 2026-01 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | Yes |  |
Facility Fees | 1.42% |  |
TOB Trust [Member] | Windsor Shores [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 17,236,000 |  |
Stated Maturity | 2026-01 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | Yes |  |
Facility Fees | 1.44% |  |
TOB Trust [Member] | SoLa Impact Opportunity Zone Fund [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 27,300,000 |  |
Stated Maturity | 2024-12 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | No |  |
Facility Fees | 1.78% |  |
TOB Trust [Member] | The Ivy Apartments [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 24,400,000 |  |
Stated Maturity | 2026-02 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | Yes |  |
Facility Fees | 1.44% |  |
TOB Trust [Member] | Village at Hanford Square [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 7,800,000 |  |
Stated Maturity | 2026-05 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | Yes |  |
Facility Fees | 1.44% |  |
TOB Trust [Member] | MaryAlice Circle [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 4,720,000 |  |
Stated Maturity | 2026-05 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | Yes |  |
Facility Fees | 1.44% |  |
TOB Trust [Member] | Meadow Valley [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 8,606,000 |  |
Stated Maturity | 2026-06 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | Yes |  |
Facility Fees | 1.44% |  |
TOB Trust [Member] | Village Point [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 18,400,000 |  |
Stated Maturity | 2024-06 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | Yes |  |
Facility Fees | 1.61% |  |
TOB Trust [Member] | Live 929 Series 2022A & 2022B [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing |  | $ 55,990,000 |
Stated Maturity |  | 2024-02 |
Interest Rate Type |  | Variable |
Tax-Exempt Interest on Senior Securities |  | No |
Facility Fees |  | 1.15% |
TOB Trust [Member] | Residency at the Entrepreneur MRBs and Taxable [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing |  | $ 14,000,000 |
Stated Maturity |  | 2025-04 |
Interest Rate Type |  | Variable |
Tax-Exempt Interest on Senior Securities |  | No |
Facility Fees |  | 1.18% |

X
- Definition Debt financing liabilities net. + References No definition available. + Details
Name: | ghi_DebtFinancingLiabilitiesNet
Namespace Prefix: | ghi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt financing tax-exempt Interest on Senior Securities. + References No definition available. + Details
Name: | ghi_DebtFinancingTaxExemptInterestOnSeniorSecurities
Namespace Prefix: | ghi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt instrument maturity month and year. + References No definition available. + Details
Name: | ghi_DebtInstrumentMaturityMonthAndYear
Namespace Prefix: | ghi_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt instrument percentage of facility fees. + References No definition available. + Details
Name: | ghi_DebtInstrumentPercentageOfFacilityFees
Namespace Prefix: | ghi_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Description of reference rate used for variable rate of debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=ghi_TOBTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

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

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

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

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