CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Revenues
Rental income	$ 38,187	$ 33,818
Interest income	3,408akr_MortgageInterestIncome	3,164akr_MortgageInterestIncome
Expense reimbursements	10,066us-gaap_TenantReimbursements	8,790us-gaap_TenantReimbursements
Other	820us-gaap_OtherRealEstateRevenue	913us-gaap_OtherRealEstateRevenue
Total revenues	52,481us-gaap_RealEstateRevenueNet	46,685us-gaap_RealEstateRevenueNet
Operating Expenses
Property operating	7,731	7,124
Other operating	2,120us-gaap_OtherCostAndExpenseOperating	687us-gaap_OtherCostAndExpenseOperating
Real estate taxes	6,292us-gaap_RealEstateTaxExpense	5,670us-gaap_RealEstateTaxExpense
General and administrative	7,532us-gaap_GeneralAndAdministrativeExpense	6,896us-gaap_GeneralAndAdministrativeExpense
Depreciation and amortization	13,658us-gaap_DepreciationAndAmortization	11,587us-gaap_DepreciationAndAmortization
Total operating expenses	37,333us-gaap_OperatingExpenses	31,964us-gaap_OperatingExpenses
Operating income	15,148us-gaap_OperatingIncomeLoss	14,721us-gaap_OperatingIncomeLoss
Equity in earnings of unconsolidated affiliates	6,593	3,029
Loss on debt extinguishment	(109)	(203)
Gain on disposition of property	27,143	12,387
Interest and other finance expense	(8,821)us-gaap_InterestAndDebtExpense	(10,651)us-gaap_InterestAndDebtExpense
Income from continuing operations before income tax provision	39,954	19,283
Income tax provision	(1,417)us-gaap_IncomeTaxExpenseBenefit	(168)us-gaap_IncomeTaxExpenseBenefit
Net income	38,537	19,115
Net (income) loss attributable to noncontrolling interests	(21,990)	2,480
Net income attributable to Common Shareholders	$ 16,547	$ 21,595
Basic and diluted earnings per share	$ 0.24us-gaap_EarningsPerShareBasic	$ 0.38us-gaap_EarningsPerShareBasic

Interest income earned on loans issued by the company secured by mortgaged properties.

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The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Interest and debt related expenses associated with nonoperating financing activities of the entity.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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The net result for the period of deducting operating expenses from operating revenues.

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The total amount of lease revenue recognized for the period for which the lessee was obligated under leasing arrangements regardless of any other events or conditions. This amount excludes contingent revenue and sublease revenue.

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The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

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Other real estate revenue not otherwise specified in the taxonomy.

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The aggregate revenue from real estate operations during the reporting period.

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A tax based on the assessed value of real estate by the local government. The tax is usually based on the value of property (including the land).

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In accordance with the provisions of their lease agreement, this element represents allowable charges due a landlord from its tenant. In retail store and office building leases, for example, tenant reimbursements may cover items such as taxes, utilities, and common area expenses.

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