XML 137 R125.htm IDEA: XBRL DOCUMENT v3.25.0.1

Commitments and Contingencies - Summary of Partnership's Total and Remaining Commitments (Details)	12 Months Ended
	Dec. 31, 2024 USD ($)
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	$ 381,597,335
Remaining Commitment as of December 31, 2024	171,447,584
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	134,000,000
Remaining Commitment as of December 31, 2024	$ 34,386,043
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Safford [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2023-10
Maturity Date	2026-10
Interest Rate	7.59%
Total Initial Commitment	$ 43,000,000
Remaining Commitment as of December 31, 2024	$ 5,651,043
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%
Total Initial Commitment	$ 44,000,000
Remaining Commitment as of December 31, 2024	$ 2,935,000
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
Total Initial Commitment	$ 8,000,000
Remaining Commitment as of December 31, 2024	$ 4,600,000
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%
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%
Total Initial Commitment	$ 10,400,000
Remaining Commitment as of December 31, 2024	$ 1,400,000
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%
Total Initial Commitment	$ 47,000,000
Remaining Commitment as of December 31, 2024	$ 25,800,000
Mortgage Revenue Bonds and Taxable Mortgage Revenue Bonds [Member] | The Residency At Empire [Member] | Series BB-T Mortgage [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2022-12
Maturity Date	2025-12
Interest Rate	7.45%
Total Initial Commitment	$ 9,404,500
Remaining Commitment as of December 31, 2024	$ 8,404,500
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%
Total Initial Commitment	$ 5,950,000
Remaining Commitment as of December 31, 2024	1,400,000
Taxable Mortgage Revenue Bonds [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	33,754,500
Remaining Commitment as of December 31, 2024	15,804,500
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	80,369,507
Remaining Commitment as of December 31, 2024	$ 18,778,207
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
Interest Rate	6.78%
Total Initial Commitment	$ 22,250,000
Remaining Commitment as of December 31, 2024	$ 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
Interest Rate	6.78%
Total Initial Commitment	$ 39,119,507
Remaining Commitment as of December 31, 2024	$ 5,569,507
Governmental Issuer Loans and Taxable Governmental Issuer Loans [Member] | Natchitoches Thomas Apartments [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2024-12
Maturity Date	2027-07
Interest Rate	7.92%
Total Initial Commitment	$ 19,000,000
Remaining Commitment as of December 31, 2024	12,500,000
Taxable Governmental Issuer Loans [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	60,579,465
Remaining Commitment as of December 31, 2024	$ 46,421,793
Taxable Governmental Issuer Loans [Member] | Poppy Grove I [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2022-09
Maturity Date	2025-04
Interest Rate	6.78%
Total Initial Commitment	$ 21,157,672
Remaining Commitment as of December 31, 2024	$ 10,000,000
Taxable Governmental Issuer Loans [Member] | Poppy Grove II [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2022-09
Maturity Date	2025-04
Interest Rate	6.78%
Total Initial Commitment	$ 10,941,300
Remaining Commitment as of December 31, 2024	$ 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
Interest Rate	6.78%
Total Initial Commitment	$ 24,480,493
Remaining Commitment as of December 31, 2024	$ 23,480,493
Taxable Governmental Issuer Loans [Member] | Natchitoches Thomas Apartments [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2024-12
Maturity Date	2027-07
Interest Rate	7.92%
Total Initial Commitment	$ 4,000,000
Remaining Commitment as of December 31, 2024	3,000,000
Property Loans [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	29,846,000
Remaining Commitment as of December 31, 2024	$ 28,846,000
Property Loans [Member] | Sandoval Flats [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2024-11
Maturity Date	2027-12
Interest Rate	7.48%
Total Initial Commitment	$ 29,846,000
Remaining Commitment as of December 31, 2024	28,846,000
Joint Venture Investments [Member]
Commitments And Other Guarantees [Line Items]
Total Initial Commitment	43,047,863
Remaining Commitment as of December 31, 2024	$ 27,211,041
Joint Venture Investments [Member] | Vantage At San Marcos [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2020-11
Total Initial Commitment	$ 9,914,529
Remaining Commitment as of December 31, 2024	$ 8,943,914
Joint Venture Investments [Member] | Freestone Greeley [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2022-10
Total Initial Commitment	$ 16,035,710
Remaining Commitment as of December 31, 2024	$ 10,562,345
Joint Venture Investments [Member] | Freestone Ladera [Member]
Commitments And Other Guarantees [Line Items]
Commitment Date	2023-12
Total Initial Commitment	$ 17,097,624
Remaining Commitment as of December 31, 2024	$ 7,704,782

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

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:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ghi_MortgageRevenueBondsAndTaxableMortgageRevenueBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=ghi_TheSaffordMember
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_TheResidencyAtEntrepreneurMember
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:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
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_TheResidencyAtEmpireMember
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_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_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:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=ghi_NatchitochesThomasApartmentsMember
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:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=ghi_PoppyGroveOneMember
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_SandovalFlatsMember
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_FreestoneGreeleyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=ghi_FreestoneLaderaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: