Number of real estate projects put into service during period.

No definition available.

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Namespace Prefix:	akr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column G))
-URI http://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014

+ Details

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

- 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_PropertyPlantAndEquipmentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=akr_CorePortfolioMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=akr_FundPortfolioMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	srt_ConsolidatedEntitiesAxis=akr_FundIvDevelopmentPropertyMember
Namespace Prefix:
Data Type:	na
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Period Type:

Real Estate - Real Estate Under Development and Construction in Progress - Additional Information (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Dec. 31, 2021 USD ($) Property	Jun. 30, 2021 Property	Mar. 31, 2021 Property	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)
Property, Plant and Equipment [Line Items]
Notes receivable, net	$ 153,886			$ 123,966
Fund IV
Property, Plant and Equipment [Line Items]
Notes receivable, net				29,800
Core Portfolio
Property, Plant and Equipment [Line Items]
Number of projects put into service during period \| Property		1	1
Notes receivable, net				13,500	$ 16,000
Fund Portfolio \| Fund IV
Property, Plant and Equipment [Line Items]
Number of projects put into service during period \| Property	1
Impairment charge				12,900
Fund Portfolio \| Fund IV development property
Property, Plant and Equipment [Line Items]
Impairment charge				$ 18,700