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STRUCTURED FINANCINGS, NET - Schedule of Notes Receivable (Details) (USD $)	1 Months Ended	3 Months Ended
	Feb. 28, 2015	Mar. 31, 2015 loan		Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items]
Net carrying amounts of notes receivable		$ 98,560,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages		$ 102,286,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
Number of cross collateralized loans		3akr_MortgageLoansonRealEstateNumberofCrossCollateralizedLoans
Number of borrowers		1akr_MortgageLoansonRealEstateNumberofBorrowers
Additional investment	400,000us-gaap_PaymentsToAcquireLoansReceivable
First Mortgage Loan, 6% Loan Due On Demand
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		7.70%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_FirstMortgageLoanSixPercentLoanDueOnDemandMember
Net carrying amounts of notes receivable		12,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_FirstMortgageLoanSixPercentLoanDueOnDemandMember		12,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_FirstMortgageLoanSixPercentLoanDueOnDemandMember
Mezzanine Loan, 10% Due On Demand
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		10.00%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanTenPercentDueOnDemandMember
First Priority liens		87,477,000,000us-gaap_MortgageLoansOnRealEstatePriorLiens1 / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanTenPercentDueOnDemandMember
Net carrying amounts of notes receivable		7,983,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanTenPercentDueOnDemandMember		7,983,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanTenPercentDueOnDemandMember
First Mortgage Loan, 5.5% Loan Due 2016
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		5.50%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_FirstMortgageLoanFivePointFivePercentLoanDue2016Member
Net carrying amounts of notes receivable		4,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_FirstMortgageLoanFivePointFivePercentLoanDue2016Member		4,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_FirstMortgageLoanFivePointFivePercentLoanDue2016Member
Zero Coupon Loan
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		24.00%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_ZeroCouponLoanMember
First Priority liens		166,200,000,000us-gaap_MortgageLoansOnRealEstatePriorLiens1 / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_ZeroCouponLoanMember
Net carrying amounts of notes receivable		5,149,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_ZeroCouponLoanMember		4,986,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_ZeroCouponLoanMember
Preferred Equity, 8.1% Loan, Due 2017
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		8.10%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_PreferredEquityEightPointOnePercentLoanDue2017Member
First Priority liens		20,855,000,000us-gaap_MortgageLoansOnRealEstatePriorLiens1 / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_PreferredEquityEightPointOnePercentLoanDue2017Member
Net carrying amounts of notes receivable		13,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_PreferredEquityEightPointOnePercentLoanDue2017Member		13,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_PreferredEquityEightPointOnePercentLoanDue2017Member
Other Loan, 15%, Loan Due 2020 [Member]
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		15.00%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_OtherLoanFifteenPercentLoanDue2020Member
Net carrying amounts of notes receivable		30,879,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_OtherLoanFifteenPercentLoanDue2020Member		30,879,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_OtherLoanFifteenPercentLoanDue2020Member
Mezzanine Loan, 12.7% Loan, Due 2015
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		12.70%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanTwelvePointSevenPercentLoanDue2015Member
First Priority liens		18,900,000,000us-gaap_MortgageLoansOnRealEstatePriorLiens1 / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanTwelvePointSevenPercentLoanDue2015Member
Net carrying amounts of notes receivable		8,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanTwelvePointSevenPercentLoanDue2015Member		8,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanTwelvePointSevenPercentLoanDue2015Member
First Mortgage Loan, Eight Point Eight Percent Loan, Due 2015 [Member]
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		8.80%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_FirstMortgageLoanEightPointEightPercentLoanDue2015Member
Net carrying amounts of notes receivable		7,500,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_FirstMortgageLoanEightPointEightPercentLoanDue2015Member		7,500,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_FirstMortgageLoanEightPointEightPercentLoanDue2015Member
Preferred Equity, 13.5% Loan, Due 2016
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		13.50%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_PreferredEquityThirteenPointFivePercentLoanDue2016Member
Net carrying amounts of notes receivable		4,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_PreferredEquityThirteenPointFivePercentLoanDue2016Member		4,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_PreferredEquityThirteenPointFivePercentLoanDue2016Member
Other Loan, 2.5% Plus LIBOR Variable Interest Rate, Due 2020
Mortgage Loans on Real Estate [Line Items]
Net carrying amounts of notes receivable		0us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanLIBORPlusTwoPointFivePercentVariableInterestRateDue2020Member		4,000,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanLIBORPlusTwoPointFivePercentVariableInterestRateDue2020Member
Other Loan, 2.5% Plus LIBOR Variable Interest Rate, Due 2020 | LIBOR
Mortgage Loans on Real Estate [Line Items]
Loans receivable, basis spread on variable rate		2.50%us-gaap_LoansReceivableBasisSpreadOnVariableRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanLIBORPlusTwoPointFivePercentVariableInterestRateDue2020Member / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember
Other Loan, 18%, Due 2017
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		18.00%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanEighteenPercentDue2017Member
Net carrying amounts of notes receivable		3,457,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanEighteenPercentDue2017Member		3,307,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_MezzanineLoanEighteenPercentDue2017Member
Individually Less Than 3 Percent, Variable Interest Rate
Mortgage Loans on Real Estate [Line Items]
First Priority liens
Net carrying amounts of notes receivable		$ 2,592,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_IndividuallyLessThanThreePercentVariableInterestRateDue2014toCapitalEventMember		$ 2,631,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_IndividuallyLessThanThreePercentVariableInterestRateDue2014toCapitalEventMember
Number of loans		2us-gaap_MortgageLoansOnRealEstateNumberOfLoans / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_IndividuallyLessThanThreePercentVariableInterestRateDue2014toCapitalEventMember
Individually Less Than 3 Percent, Variable Interest Rate | Minimum
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		3.90%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_IndividuallyLessThanThreePercentVariableInterestRateDue2014toCapitalEventMember / us-gaap_RangeAxis = us-gaap_MinimumMember	[1]
Individually Less Than 3 Percent, Variable Interest Rate | Maximum
Mortgage Loans on Real Estate [Line Items]
Effective interest rate		11.60%akr_MortgageLoansOnRealEstateEffectiveInterestRate / us-gaap_MortgageLoansOnRealEstateLoanTypeAxis = akr_IndividuallyLessThanThreePercentVariableInterestRateDue2014toCapitalEventMember / us-gaap_RangeAxis = us-gaap_MaximumMember	[1]
Nonperforming Financing Receivable [Member]
Mortgage Loans on Real Estate [Line Items]
Number of instruments held		3akr_DebtInstrumentsNumberofInstrumentsHeld / akr_FinancialInstrumentPerformanceStatusAxis = us-gaap_NonperformingFinancingReceivableMember
[1] Includes origination and exit fees

X

- Definition

Debt Instruments, Number of Instruments Held

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- Definition

Mortgage Loans on Real Estate, Effective Interest Rate

+ References

No definition available.

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- Definition

Mortgage Loans on Real Estate, Number of Borrowers

+ References

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- Definition

Mortgage Loans on Real Estate, Number of Cross Collateralized Loans

+ References

No definition available.

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- Definition

The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin.

+ References

No definition available.

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- Definition

The carrying amount of the outstanding balance due under the mortgage loan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 10

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- Definition

Indicates the number of mortgages under each classification.

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- Definition

Amount of prior lien on the real estate that secures the mortgage loan.

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- Definition

The cash outflow for the purchase of loan receivable arising from the financing of goods and services.

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-Glossary Investing Activities

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