Business of Organization - Additional Information (Details)	Sep. 30, 2024	Dec. 31, 2023
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%

Percentage of ownership interests in operating partnership.

No definition available.

Name:	ahh_PercentageOfOwnershipInterestsInOperatingPartnership
Namespace Prefix:	ahh_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant