v3.26.1
Other Assets - Summary of Taxable MRBs Acquired (Parenthetical) (Details)
Jun. 30, 2026
Facility
Mortgage Revenue Bonds [Member]
Governmental Issuer Loans [Line Items]
Number of multifamily rental housing facilities
2
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
Number of multifamily rental housing facilities.
+ References
No definition available.
+ Details
Name:
ghi_NumberOfMultifamilyRentalHousingFacilities
Namespace Prefix:
ghi_
Data Type:
xbrli:integerItemType
Balance Type:
na
Period Type:
instant
X
- Details
Name:
us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ghi_MortgageRevenueBondsMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type: