Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility terminates, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=akr_OneHundredSeventyFiveMillionTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=akr_SeniorUnsecuredCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=akr_FourHundredMillionTermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - Credit Facility - Additional Information (Details) - USD ($) $ in Millions		6 Months Ended
	Apr. 06, 2022	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 900.0	$ 0.0
Line of Credit Facility, Remaining Borrowing Capacity		$ 150.0
Maturity date		Apr. 06, 2027
$175 Million Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 175.0	$ 175.0
Basis spread on variable rate	1.50%	2.50%
Line of Credit Facility, Remaining Borrowing Capacity		$ 175.0
Unsecured Debt
Debt Instrument [Line Items]
Maturity date		Jun. 29, 2026
Unsecured Debt \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 300.0
Basis spread on variable rate		1.40%
Maturity date		Jun. 29, 2025
Unsecured Debt \| Senior Unsecured Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 700.0
Unsecured Debt \| $400 Million Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 400.0
Basis spread on variable rate		1.55%