XML 80 R73.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Governmental Issuer Loans - Schedule of Principal and Accrued Interest Paid (Details) - Hope on Avalon [Member] - Governmental Issuer Loans [Member] | 3 Months Ended
--- | ---
Mar. 31, 2024 USD ($)
Governmental Issuer Loans [Line Items] |
Month Redeemed | 2024-01
Principal Proceeds | $ 23,390,000

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 Month and year of principal and accrued interest redeemed. + References No definition available. + Details
Name: | ghi_MonthAndYearOfPrincipalAndAccruedInterestRedeemed
Namespace Prefix: | ghi_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow associated with principal collections from a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-12 + Details
Name: | us-gaap_ProceedsFromCollectionOfNotesReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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