Asset Acquisition, Percentage Of Economic Interest Acquired

No definition available.

Name:	ahh_AssetAcquisitionPercentageOfEconomicInterestAcquired
Namespace Prefix:	ahh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Asset Acquisition, Percentage of Ownership Interest

+ References

No definition available.

+ Details

Name:	ahh_AssetAcquisitionPercentageOfOwnershipInterest
Namespace Prefix:	ahh_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Finance Receivable Allowance For Credit Loss And Off-Balance-Sheet, Credit Loss, Liability

+ References

No definition available.

+ Details

Name:	ahh_FinanceReceivableAllowanceForCreditLossAndOffBalanceSheetCreditLossLiability
Namespace Prefix:	ahh_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Financing Receivable, Interest Rate, Stated Percentage

+ References

No definition available.

+ Details

Name:	ahh_FinancingReceivableInterestRateStatedPercentage
Namespace Prefix:	ahh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Financing Receivable, Unused Commitment Fee, Percentage

+ References

No definition available.

+ Details

Name:	ahh_FinancingReceivableUnusedCommitmentFeePercentage
Namespace Prefix:	ahh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Financial Instruments

+ References

No definition available.

+ Details

Name:	ahh_NumberOfFinancialInstruments
Namespace Prefix:	ahh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- 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

No definition available.

+ Details

Name:	us-gaap_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7)(2))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (f)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (3)

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (c)

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (1)

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (3)

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (2)

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

+ Details

Name:	us-gaap_NotesReceivableNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_AssetAcquisitionAxis=ahh_ConstellationEnergyBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ahh_MezzanineLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=ahh_SolisGainesvilleMultifamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ahh_FinancingReceivableEffectivePeriodAxis=ahh_FirstTwentyFourMonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ahh_FinancingReceivableEffectivePeriodAxis=ahh_TwentyFourAndThirtySixMonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ahh_FinancingReceivableEffectivePeriodAxis=ahh_ThirtySixMonthsThroughMaturityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=ahh_ConstellationEnergyBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Notes Receivable and Current Expected Credit Losses - Additional Information (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) loan	Mar. 29, 2023	Jan. 14, 2023	Jan. 01, 2023	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Jan. 14, 2022	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses	$ 1,495,000				$ 1,292,000	$ 1,178,000		$ 994,000
Notes receivable, net	133,082,000				136,039,000
Notes receivable, nonaccrual status	0
Finance Receivable Allowance For Credit Loss And Off-Balance-Sheet, Credit Loss, Liability	$ 1,693,000				$ 1,630,000	$ 1,609,000		$ 1,004,000
Constellation Energy Building
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of economic interest acquired			11.00%				11.00%
Percentage of ownership interest			0.90
Mezzanine loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of financial instruments \| loan	3
Mezzanine loan \| Solis Gainesville II
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate	14.00%
Unused commitment fee percentage	10.00%			10.00%
Mezzanine loan \| Solis Gainesville II \| First 24 Months
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate		14.00%
Mezzanine loan \| Solis Gainesville II \| Twenty Four and Thirty Six Months
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate		10.00%
Mezzanine loan \| Solis Gainesville II \| Thirty Six Months Through Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate		14.00%
Mezzanine loan \| Constellation Energy Building
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate					3.00%