XML 126 R115.htm IDEA: XBRL DOCUMENT
v3.23.2

Commitments and Contingencies - Summary of Partnership's Total and Remaining Commitments (Details) | 6 Months Ended
--- | ---
Jun. 30, 2023 USD ($)
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | $ 531,877,182 |
Remaining Commitment as of June 30, 2023 | $ 364,298,375 |
The Residency at Empire [Member] | Series BB-3 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Maturity Date | 2029-12 |
Interest Rate | 6.00% |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | $ 152,500,000 |
Remaining Commitment as of June 30, 2023 | $ 135,070,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency At Mayer [Member] | Series A T Mortgage [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-10 |
Maturity Date | 2024-04 | [1]
Total Initial Commitment | $ 12,500,000 |
Remaining Commitment as of June 30, 2023 | $ 8,000,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency At Mayer [Member] | Series A T Mortgage [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.70% | [2]
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-3 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-04 |
Maturity Date | 2040-03 |
Interest Rate | 6.00% | [2]
Total Initial Commitment | $ 26,080,000 |
Remaining Commitment as of June 30, 2023 | $ 21,180,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-4 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-04 |
Maturity Date | 2040-03 |
Total Initial Commitment | $ 16,420,000 |
Remaining Commitment as of June 30, 2023 | $ 16,420,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-4 [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.60% | [2],[3]
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-5 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2023-02 |
Maturity Date | 2025-04 | [1]
Total Initial Commitment | $ 5,000,000 |
Remaining Commitment as of June 30, 2023 | $ 4,000,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-5 [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.60% | [2]
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-T [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-04 |
Maturity Date | 2025-04 | [1]
Total Initial Commitment | $ 8,000,000 |
Remaining Commitment as of June 30, 2023 | $ 7,000,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at the Entrepreneur [Member] | Series J-T [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.65% | [2]
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at Empire [Member] | Series BB-3 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-12 |
Maturity Date | 2040-12 |
Interest Rate | 6.45% | [2],[4]
Total Initial Commitment | $ 14,000,000 |
Remaining Commitment as of June 30, 2023 | $ 13,945,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at Empire [Member] | Series BB-4 [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-12 |
Maturity Date | 2040-12 |
Interest Rate | 6.45% | [2],[5]
Total Initial Commitment | $ 47,000,000 |
Remaining Commitment as of June 30, 2023 | $ 47,000,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency at Empire [Member] | Series BB-T [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-12 |
Maturity Date | 2025-12 | [1]
Interest Rate | 7.45% | [2]
Total Initial Commitment | $ 9,404,500 |
Remaining Commitment as of June 30, 2023 | $ 8,404,500 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | Meadow Valley [Member] | Series A [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-12 |
Maturity Date | 2029-12 |
Interest Rate | 6.25% | [2]
Total Initial Commitment | $ 44,000,000 |
Remaining Commitment as of June 30, 2023 | $ 32,525,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | Village at Hanford Square [Member] | Series H-T [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2023-05 |
Maturity Date | 2030-05 |
Interest Rate | 7.25% | [2]
Total Initial Commitment | $ 10,400,000 |
Remaining Commitment as of June 30, 2023 | $ 9,400,000 |
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | 40rty On Colony [Member] | Series P-T [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2023-06 |
Maturity Date | 2030-06 |
Interest Rate | 7.45% | [2]
Total Initial Commitment | $ 5,950,000 |
Remaining Commitment as of June 30, 2023 | 4,950,000 |
Taxable Mortgage Revenue Bonds [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 46,254,500 |
Remaining Commitment as of June 30, 2023 | 37,754,500 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 157,057,835 |
Remaining Commitment as of June 30, 2023 | $ 67,093,555 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Osprey Village [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-07 |
Maturity Date | 2024-08 | [1]
Total Initial Commitment | $ 60,000,000 |
Remaining Commitment as of June 30, 2023 | $ 1,473,020 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Osprey Village [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.07% | [2]
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Poppy Grove I [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [1]
Interest Rate | 6.78% | [2]
Total Initial Commitment | $ 35,688,328 |
Remaining Commitment as of June 30, 2023 | $ 22,342,328 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Poppy Grove II [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [1]
Interest Rate | 6.78% | [2]
Total Initial Commitment | $ 22,250,000 |
Remaining Commitment as of June 30, 2023 | $ 15,708,700 |
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Poppy Grove III [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [1]
Interest Rate | 6.78% | [2]
Total Initial Commitment | $ 39,119,507 |
Remaining Commitment as of June 30, 2023 | 27,569,507 |
Taxable Governmental Issuer Loans [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 56,579,465 |
Remaining Commitment as of June 30, 2023 | $ 53,579,465 |
Taxable Governmental Issuer Loans [Member] | Poppy Grove I [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [1]
Interest Rate | 6.78% | [2]
Total Initial Commitment | $ 21,157,672 |
Remaining Commitment as of June 30, 2023 | $ 20,157,672 |
Taxable Governmental Issuer Loans [Member] | Poppy Grove II [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [1]
Interest Rate | 6.78% | [2]
Total Initial Commitment | $ 10,941,300 |
Remaining Commitment as of June 30, 2023 | $ 9,941,300 |
Taxable Governmental Issuer Loans [Member] | Poppy Grove III [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-09 |
Maturity Date | 2025-04 | [1]
Interest Rate | 6.78% | [2]
Total Initial Commitment | $ 24,480,493 |
Remaining Commitment as of June 30, 2023 | 23,480,493 |
Property Loans [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 46,851,328 |
Remaining Commitment as of June 30, 2023 | $ 35,820,296 |
Property Loans [Member] | Osprey Village [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-07 |
Maturity Date | 2024-08 | [1]
Total Initial Commitment | $ 25,500,000 |
Remaining Commitment as of June 30, 2023 | $ 24,500,000 |
Property Loans [Member] | Osprey Village [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.07% | [2]
Property Loans [Member] | Willow Place Apartments [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-09 |
Maturity Date | 2024-10 | [1]
Total Initial Commitment | $ 21,351,328 |
Remaining Commitment as of June 30, 2023 | $ 11,320,296 |
Property Loans [Member] | Willow Place Apartments [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 3.30% | [2]
Property Loans [Member] | Anaheim & Walnut [Member] | SOFR [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Interest Rate | 4.85% | [2]
Joint Venture Investments [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | $ 68,734,054 |
Remaining Commitment as of June 30, 2023 | $ 31,080,559 |
Joint Venture Investments [Member] | Vantage at San Marcos [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2020-11 | [6],[7]
Total Initial Commitment | $ 9,914,529 | [6],[7]
Remaining Commitment as of June 30, 2023 | $ 8,943,914 | [6],[7]
Joint Venture Investments [Member] | Vantage at Loveland [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-04 | [8]
Total Initial Commitment | $ 18,215,000 | [8]
Remaining Commitment as of June 30, 2023 | $ 1,886,000 | [8]
Joint Venture Investments [Member] | Freestone Greeley [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-10 | [6]
Total Initial Commitment | $ 16,035,710 | [6]
Remaining Commitment as of June 30, 2023 | $ 11,325,008 | [6]
Joint Venture Investments [Member] | Freestone Cresta Bella [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2022-11 |
Total Initial Commitment | $ 16,405,514 |
Remaining Commitment as of June 30, 2023 | $ 6,165,518 |
Joint Venture Investments [Member] | Valage Senior Living Carson Valley [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2023-02 |
Total Initial Commitment | $ 8,163,301 |
Remaining Commitment as of June 30, 2023 | 2,760,119 |
Bond Purchase Commitment [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Total Initial Commitment | 3,900,000 |
Remaining Commitment as of June 30, 2023 | $ 3,900,000 |
Bond Purchase Commitment [Member] | Anaheim & Walnut [Member] |  |
Commitments And Other Guarantees [Line Items] |  |
Commitment Date | 2021-09 |
Maturity Date | Q3 2024 | [9]
Total Initial Commitment | $ 3,900,000 |
Remaining Commitment as of June 30, 2023 | $ 3,900,000 |
[1] | The borrowers may elect to extend the maturity date for a period ranging between six and twelve months upon meeting certain conditions, which may include payment of a non-refundable extension fee.
[2] | The variable index interest rate components are typically subject to floors that range from 0% to 0.85%.
[3] | Upon stabilization, the MRB will convert to a fixed rate of 8.0% and become subordinate to the other senior MRBs.
[4] | Beginning December 2029, the interest rate will change to the greater of (i) 3.25% over the then 10-Year SOFR Swap rate, or (ii) 6.00%.
[5] | Upon stabilization, the MRB will convert to a fixed rate of 10.0% and become subordinate to the other senior MRBs of the borrower.
[6] | A development site has been identified for this property but construction had not commenced as of June 30, 2023.
[7] | The property became a consolidated VIE effective during the fourth quarter of 2021 (Note 5).
[8] | In July 2023, the Partnership's initial commitment of $16.3 million was increased by $1.9 million upon meeting certain conditions as outlined in the original agreement.
[9] | This is the estimated closing date of the associated bond purchase commitment.

X
- Definition Commitment date. + References No definition available. + Details
Name: | ghi_CommitmentDate
Namespace Prefix: | ghi_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Commitment maturity date. + References No definition available. + Details
Name: | ghi_CommitmentMaturityDate
Namespace Prefix: | ghi_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Commitment maturity date description. + References No definition available. + Details
Name: | ghi_CommitmentMaturityDateDescription
Namespace Prefix: | ghi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Commitments and other guarantees. + References No definition available. + Details
Name: | ghi_CommitmentsAndOtherGuaranteesLineItems
Namespace Prefix: | ghi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Investment commitments interest rate percentage + References No definition available. + Details
Name: | ghi_InvestmentCommitmentsInterestRatePercentage
Namespace Prefix: | ghi_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Partnership's commitments amount + References No definition available. + Details
Name: | ghi_PartnershipsCommitmentsAmount
Namespace Prefix: | ghi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Remaining partnership's commitments amount. + References No definition available. + Details
Name: | ghi_RemainingPartnershipsCommitmentsAmount
Namespace Prefix: | ghi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_SeriesBbThreeMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_SeriesATMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_SeriesJThreeMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_SeriesJFourMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_SeriesJFiveMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_SeriesJTMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_SeriesBbFourMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_SeriesBbTMortgageMember
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_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=us-gaap_FirstMortgageMember
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_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_SeriesHTMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_SeriesPTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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