Net proceeds after transaction costs and tax protection payments.

No definition available.

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Namespace Prefix:	ahh_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

This element represents the amount of gain (loss) on sale of properties during the reporting period gross of the applicable income taxes realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 974
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-15.(a)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=6875705&loc=d3e641549-123027

+ Details

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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

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Period Type:	duration

- Definition

Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585

+ Details

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Period Type:	duration

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- Details

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- Details

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- Details

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- Details

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Real Estate Investments - Dispositions (Detail) - USD ($) $ in Thousands					3 Months Ended
	Apr. 29, 2016	Apr. 19, 2016	Jan. 08, 2016	Jan. 07, 2016	Mar. 31, 2016	Mar. 31, 2015
Real Estate Dispositions
Dispositions of real estate investments					$ 83,748	$ 15,224
Richmond Tower \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Real Estate Dispositions
Dispositions of real estate investments			$ 78,000
Net proceeds after transaction costs			77,000
Gain (Loss) on disposition of property			$ 26,200
Economic Development Authority Building \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Real Estate Dispositions
Net proceeds after transaction costs				$ 6,600
Gain (Loss) on disposition of property				$ 400
Willowbrook Commons \| Disposal Group, Held-for-sale, Not Discontinued Operations \| Subsequent Event \| Forecast
Real Estate Dispositions
Dispositions of real estate investments		$ 9,300
Oakland Marketplace \| Disposal Group, Held-for-sale, Not Discontinued Operations \| Subsequent Event \| Forecast
Real Estate Dispositions
Dispositions of real estate investments	$ 5,400
Broadmoor Plaza \| Disposal Group, Held-for-sale, Not Discontinued Operations \| Subsequent Event \| Forecast
Real Estate Dispositions
Dispositions of real estate investments	$ 13,600