XML 58 R48.htm IDEA: XBRL DOCUMENT
v3.22.1

Real Estate - Schedule of Property Dispositions (Details) (Parenthetical) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2021 USD ($)
Fund IV | 110 University Place |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Gain (loss) on termination of lease | $ 0.7

X
- Definition Amount of gain (loss) on termination of lease before expiration of lease term. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123386189&loc=SL77918607-209975 + Details
Name: | us-gaap_GainLossOnTerminationOfLease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=akr_FundIVMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=akr_OneOneZeroUniversityNewYorkNYMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |