XML 90 R79.htm IDEA: XBRL DOCUMENT
v3.23.2

Investments in Unconsolidated Entities - Summary of Investments in Unconsolidated Entities - (Parenthetical) (Details) - Valage Senior Living Carson Valley [Member] - Minden, NV [Member] | Jun. 30, 2023 Bed Unit
--- | ---
Schedule of Equity Method Investments [Line Items] |
Number of Units | Unit | 88
Number of beds | Bed | 102

X
- Definition Number of beds in real estate property. + References No definition available. + Details
Name: | ghi_NumberOfBedsInRealEstateProperty
Namespace Prefix: | ghi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of units in a real estate property owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | srt_StatementGeographicalAxis=ghi_MindenNvMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |