Amortization of intangible liabilities.

No definition available.

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

- Definition

Number of real estate properties under development.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Proceeds from sale of real estate held-for-investment, gross.

+ References

No definition available.

+ Details

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Namespace Prefix:	akr_
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Balance Type:	debit
Period Type:	duration

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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- 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.

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+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) from deconsolidation of subsidiary and derecognition of group of assets constituting transfer of business or nonprofit activity, excluding conveyance of oil and gas mineral rights and transfer of good or service in contract with customer.

+ References

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- Definition

Percentage, before disposal, of ownership interest of discontinued operation in which equity method investment is retained.

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- Definition

This element represents disclosure of the amount of gain which has been deferred as the result of the sale of a business or operating assets to a highly leveraged entity which deferred gain has been reflected in the accompanying statement of financial position as reduction from the related asset.

+ References

No definition available.

+ Details

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

+ References

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- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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- Definition

Fair value of investment in security owned.

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Real Estate - Additional Information (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2026 USD ($) Property	Mar. 31, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) Property	Jun. 30, 2025 USD ($)	Jan. 01, 2026 Property
Business Combination [Line Items]
Amortization of intangible assets				$ 20,500
Amortization of intangible liabilities				$ 13,900
Number of properties under development \| Property	13			13		13
Gain on disposition of properties	$ 3,969		$ 0	$ 146,117	$ 0
Core Portfolio \| Fund V \| Disposed of by sale
Business Combination [Line Items]
Gain (loss) on disposition of properties		$ 142,100
Retained ownership				20.00%
Michigan \| Core Portfolio \| Fund V \| Disposed of by sale
Business Combination [Line Items]
Gain (loss) on disposition of properties	$ 4,000
Minimum
Business Combination [Line Items]
Intangible asset useful life	1 year			1 year
Maximum
Business Combination [Line Items]
Intangible asset useful life	50 years			50 years
Pinewood Square - Lake Worth, FL \| Disposed of by sale
Business Combination [Line Items]
Joint venture fair-valued	$ 13,600			$ 13,600
Gain on disposition				4,100
Sale Price				$ 68,400
Pinewood Square - Lake Worth, FL \| Core Portfolio \| Disposed of by sale
Business Combination [Line Items]
Retained ownership				20.00%
Avenue West Cobb - Marietta, GA \| Disposed of by sale
Business Combination [Line Items]
Joint venture fair-valued	$ 87,100			$ 87,100
Gain on disposition of properties				112,300
Mortgage loans \| Avenue West Cobb - Marietta, GA \| Disposed of by sale
Business Combination [Line Items]
Repayment of property mortgage loan				210,500
Preferred Equity \| Avenue West Cobb - Marietta, GA \| Disposed of by sale
Business Combination [Line Items]
Deferred gain related to the below-market preferred equity				$ 22,100
Henderson Avenue Portfolio \| Development
Business Combination [Line Items]
Number of properties under development \| Property	13			13