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v3.24.3

Business of Organization - Additional Information (Details) | Sep. 30, 2024 | Dec. 31, 2023
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Business And Organization [Line Items] |  |
Percentage of operating partnership held | 78.60% | 75.60%
General Partner |  |
Business And Organization [Line Items] |  |
Percentage of operating partnership held | 0.10% |

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- Definition Line items for business and organization. + References No definition available. + Details
Name: | ahh_BusinessAndOrganizationLineItems
Namespace Prefix: | ahh_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of ownership interests in operating partnership. + References No definition available. + Details
Name: | ahh_PercentageOfOwnershipInterestsInOperatingPartnership
Namespace Prefix: | ahh_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_GeneralPartnerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |