Single mortgage loan.

No definition available.

Name:	akr_SingleMortgageLoan
Namespace Prefix:	akr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: 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(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

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

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- 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

- Definition

The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1336-112600

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=99376301&loc=d3e1314-112600

+ Details

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

- Definition

Amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123465755&loc=d3e1927-112601

+ Details

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Balance Type:	credit
Period Type:	duration

Debt - Unsecured Notes Payable - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Jul. 29, 2022	Jun. 30, 2022	Apr. 06, 2022
Debt Instrument [Line Items]
Long-term debt outstanding	$ 1,831,231	$ 1,819,738
Maximum borrowing capacity	900,000	0
Remaining borrowing capacity	175,000			$ 150,000
Letters of credit, outstanding amount	7,000	19,700
Refinanced amount		18,500
Core Portfolio
Debt Instrument [Line Items]
Refinanced amount	25,400
Fund Portfolio \| Fund II
Debt Instrument [Line Items]
Long-term debt outstanding	132,259	255,978
Mortgages
Debt Instrument [Line Items]
Maximum borrowing capacity	42,200
Mortgages \| Core Portfolio
Debt Instrument [Line Items]
Long-term debt outstanding	204,716	218,421
Mortgages \| Fund Portfolio
Debt Instrument [Line Items]
Long-term debt outstanding	427,418	388,410
Mortgages \| Fund Portfolio \| Fund IV
Debt Instrument [Line Items]
Long-term debt outstanding	152,855	246,268
Unsecured Notes Payable \| Unsecured Debt
Debt Instrument [Line Items]
Debt available balance	85,300	16,300
Unsecured Notes Payable \| Unsecured Debt \| Fund Portfolio \| Fund II
Debt Instrument [Line Items]
Long-term debt outstanding	0	40,000
$175 Million Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity	175,000			175,000	$ 175,000
Remaining borrowing capacity				$ 175,000
$400 Million Term Loan \| Unsecured Debt
Debt Instrument [Line Items]
Long-term debt outstanding	400,000
Maximum borrowing capacity	400,000
$400 Million Term Loan \| Unsecured Debt \| Core Portfolio
Debt Instrument [Line Items]
Long-term debt outstanding		400,000
Term Loan Maturing In September 2020 \| Secured Debt \| Fund II
Debt Instrument [Line Items]
Long-term line of credit, noncurrent	40,000	40,000
Remaining borrowing capacity	0	0
Refinanced amount	40,000
Term Loan Maturing In September 2020 \| Mortgages \| Fund II
Debt Instrument [Line Items]
Single mortgage loan	198,000
Subscription Line \| Unsecured Debt \| Fund IV
Debt Instrument [Line Items]
Maximum borrowing capacity	5,000
Long-term line of credit, noncurrent	0	5,000
Remaining borrowing capacity	5,000	0
Subscription Line \| Unsecured Debt \| Fund V
Debt Instrument [Line Items]
Maximum borrowing capacity	100,000
Subscription Line \| Unsecured Debt \| Fund V \| Letter of Credit
Debt Instrument [Line Items]
Letters of credit, outstanding amount	7,000	15,700
Subscription Line \| Unsecured Debt \| Fund Portfolio \| Fund V
Debt Instrument [Line Items]
Long-term debt outstanding	49,726	118,028
Remaining borrowing capacity	43,300	16,300
Subscription Line \| Secured Bridge Facility \| Fund IV
Debt Instrument [Line Items]
Remaining borrowing capacity	37,000	$ 0
$75 million Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity	75,000		$ 75,000
Remaining borrowing capacity	$ 75,000