XML 50 R49.htm IDEA: XBRL DOCUMENT v3.20.1

Real Estate - Real Estate Under Development and Construction in Progress - Additional Information (Details)	12 Months Ended
	Dec. 31, 2018 property
Cortlandt Crossing | Fund III
Property, Plant and Equipment [Line Items]
Number of projects put into service during period	1
Core Portfolio
Property, Plant and Equipment [Line Items]
Number of projects put into service during period	1

X

- Definition

Number of real estate projects put into service during period.

+ References

No definition available.

+ Details

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

X

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

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=akr_CortlandtCrossingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=akr_FundIIIMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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