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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2023
Jun. 30, 2023
Cover [Abstract]    
Entity Registrant Name GREYSTONE HOUSING IMPACT INVESTORS LP  
Entity Central Index Key 0001059142  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Document Type 10-K  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
ICFR Auditor Attestation Flag false  
Document Financial Statement Error Correction [Flag] false  
Document Period End Date Dec. 31, 2023  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus FY  
Amendment Flag false  
Trading Symbol GHI  
Title of each class Beneficial Unit Certificates representingassignments of limited partnership interests in Greystone Housing Impact Investors LP  
Name of each exchange on which registered NYSE  
Entity Common Stock, Units Outstanding 0  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity File Number 001-41564  
Entity Tax Identification Number 47-0810385  
Entity Address, Address Line One 14301 FNB Parkway  
Entity Address, Address Line Two Suite 211  
Entity Address, City or Town Omaha  
Entity Address, State or Province NE  
Entity Address, Postal Zip Code 68154  
City Area Code 402  
Local Phone Number 952-1235  
Document Annual Report true  
Document Transition Report false  
Entity Incorporation, State or Country Code DE  
Entity Public Float   $ 374,597,882
Documents Incorporated by Reference

None

  
Auditor Name PricewaterhouseCoopers LLP  
Auditor Location Chicago, Illinois  
Auditor Firm ID 238