XML 125 R115.htm IDEA: XBRL DOCUMENT
v3.23.3

Derivative Instruments - Summary of Terms of Partnership's Total Return Swaps (Parenthetical) (Details) | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Mizuho Capital Markets 1 [Member] |  |
Derivative [Line Items] |  |
Derivative, basis spread on variable rate | 4.00% | 4.00%
Derivative, floor interest rate | 4.25% | 4.25%
Mizuho Capital Markets [Member] |  |
Derivative [Line Items] |  |
Derivative, basis spread on variable rate | 9.25% | 9.25%

X
- Definition The percentage points added to the reference rate to compute the variable rate on the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeBasisSpreadOnVariableRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Floor rate on an interest rate derivative such as an interest rate floor or collar. If market rates falls below the floor rate, a payment or receipt is triggered on the contract. + References No definition available. + Details
Name: | us-gaap_DerivativeFloorInterestRate
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480237/815-40-50-5 + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_CounterpartyNameAxis=ghi_MizuhoCapitalMarketsOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=ghi_MizuhoCapitalMarketsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |