XML 113 R106.htm IDEA: XBRL DOCUMENT
v3.24.3

Debt Financing - Summary of TOB Trust Financings (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Debt Instrument [Line Items] |  |  |
Debt financing | $ 1,062,407,615 |  | $ 1,015,030,066
TOB Trust [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | 69,230,000 | $ 137,007,000 |
TOB Trust [Member] | Southpark MRB [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 9,840,000 |  |
Stated Maturity | 2024-06 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | Yes |  |
Facility Fees | 1.44% |  |
TOB Trust [Member] | Trust 2024-XF3219 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 21,795,000 |  |
Stated Maturity | 2027-02 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | No |  |
Facility Fees | 1.79% |  |
TOB Trust [Member] | Residency at Empire MRBs [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] | Woodington Gardens - Series A - 1 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 24,920,000 |  |
Stated Maturity | 2027-04 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | Yes |  |
Facility Fees | 1.44% |  |
TOB Trust [Member] | Aventine Apartments [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 7,600,000 |  |
Stated Maturity | 2027-06 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | Yes |  |
Facility Fees | 1.44% |  |
TOB Trust [Member] | The Centurion Foundation [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing | $ 5,075,000 |  |
Stated Maturity | 2027-07 |  |
Interest Rate Type | Variable |  |
Tax-Exempt Interest on Senior Securities | No |  |
Facility Fees | 1.79% |  |
TOB Trust [Member] | 40rty on Colony MRB [Member] | MRB [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing |  | $ 4,465,000 |
Stated Maturity |  | 2026-07 |
Interest Rate Type |  | Variable |
Tax-Exempt Interest on Senior Securities |  | Yes |
Facility Fees |  | 1.44% |
TOB Trust [Member] | Sandy Creek Apartments GIL [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt financing |  | $ 9,680,000 |
Stated Maturity |  | 2026-09 |
Interest Rate Type |  | Variable |
Tax-Exempt Interest on Senior Securities |  | Yes |
Facility Fees |  | 1.44% |

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 Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69F Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I Reference 26: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 27: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 + 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_SouthparkMrbMember
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_TrustTwentyTwentyFourXFThreeThousandTwoHundredAndNineteenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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