XML 139 R129.htm IDEA: XBRL DOCUMENT
v3.23.1

Transactions with Related Parties - Summary of Transactions Between Borrowers of Partnership's MRBs and Affiliates (Parenthetical) (Details) | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Related Party Transactions [Abstract] |  |
Rate for administration fees receivable | 0.45% | 0.45%

X
- Definition Rate for administration fees - rate charged on the bonds and loans collateralized by the underlying properties for administration of the assets + References No definition available. + Details
Name: | ghi_RateForAdministrationFees
Namespace Prefix: | ghi_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration