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Transactions with Related Parties - Summary of Transactions Between Borrowers of Partnership's MRBs and Affiliates (Details) - General Partner [Member] - USD ($) | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Non-partnership property administrative fee received | [1] |  | $ 9,000
Investment/mortgage placement fees earned | [2] | $ 2,257,000 |
[1] | AFCA 2 received administrative fees directly from the owners of certain properties financed by certain MRBs held by the Partnership. These administrative fees equal 0.45% per annum of the outstanding principal balance of the MRBs. The disclosed amounts represent administrative fees received by AFCA 2 during the periods specified.
[2] | AFCA 2 received placement fees in connection with the acquisition of certain MRBs, taxable MRBs, GILs, taxable GILs and property loans and investments in unconsolidated entities.

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- Definition Investment/mortgage placement fees earned. + References No definition available. + Details
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- Definition Non-partnership administrative fee received. + References No definition available. + Details
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Namespace Prefix: | ghi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Balance Type: |
Period Type: |