XML 101 R94.htm IDEA: XBRL DOCUMENT
v3.24.3

Other Assets - Summary of Taxable MRBs Acquired (Parenthetical) (Details) | Sep. 30, 2024 USD ($)
--- | ---
Governmental Issuer Loans [Line Items] |
Floor rate | 3.95%
Committed to funding amount | $ 378,050,905
Mortgage Revenue Bonds [Member] |
Governmental Issuer Loans [Line Items] |
Borrower re-allocated previously provided funding | $ 11,500,000

X
- Definition Borrower re-allocated previously provided funding. + References No definition available. + Details
Name: | ghi_BorrowerReAllocatedPreviouslyProvidedFunding
Namespace Prefix: | ghi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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 Loan Financing Basis Spread on Variable Floor Rate. + References No definition available. + Details
Name: | ghi_LoanFinancingBasisSpreadOnVariableFloorRate
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
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ghi_MortgageRevenueBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |