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MORTGAGES AND OTHER NOTES PAYABLE Unsecured Credit Facilities (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Line of Credit Facility [Line Items] |  |  |  |
Mortgage and other notes payable | $ 1,130,481,000 us-gaap_LongTermDebt |  | $ 1,039,997,000 us-gaap_LongTermDebt |
Total amount of credit facility | 300,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity |  |  |
Amount borrowed | 77,100,000 us-gaap_LineOfCredit |  | 68,750,000 us-gaap_LineOfCredit |
Net borrowings (repayments) during the year ended December 31, 2014 | 8,350,000 us-gaap_ProceedsFromRepaymentsOfLinesOfCredit |  |  |
Letters of credit outstanding as of December 31, 2014 | 12,500,000 us-gaap_LettersOfCreditOutstandingAmount |  |  |
Amount available under credit facilities as of December 31, 2014 | 210,400,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity |  |  |
Acadia Realty, LP [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Total amount of credit facility | 150,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_StatementBusinessSegmentsAxis = akr_AcadiaRealtyLpMember |  |  |
Amount borrowed | 0 us-gaap_LineOfCredit / us-gaap_StatementBusinessSegmentsAxis = akr_AcadiaRealtyLpMember |  | 0 us-gaap_LineOfCredit / us-gaap_StatementBusinessSegmentsAxis = akr_AcadiaRealtyLpMember |
Net borrowings (repayments) during the year ended December 31, 2014 | 0 us-gaap_ProceedsFromRepaymentsOfLinesOfCredit / us-gaap_StatementBusinessSegmentsAxis = akr_AcadiaRealtyLpMember |  |  |
Letters of credit outstanding as of December 31, 2014 | 12,500,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_StatementBusinessSegmentsAxis = akr_AcadiaRealtyLpMember |  |  |
Amount available under credit facilities as of December 31, 2014 | 137,500,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_StatementBusinessSegmentsAxis = akr_AcadiaRealtyLpMember |  |  |
Fund IV [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Total amount of credit facility | 150,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |  |  |
Amount borrowed | 77,100,000 us-gaap_LineOfCredit / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |  | 68,750,000 us-gaap_LineOfCredit / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |
Net borrowings (repayments) during the year ended December 31, 2014 | 8,350,000 us-gaap_ProceedsFromRepaymentsOfLinesOfCredit / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |  |  |
Letters of credit outstanding as of December 31, 2014 | 0 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |  |  |
Amount available under credit facilities as of December 31, 2014 | 72,900,000 us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |  |  |
Unsecured Debt [Member] | Fund IV [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Mortgage and other notes payable | 77,100,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember | [1] | 68,750,000 us-gaap_LongTermDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember | [1]
Unsecured Debt [Member] | LIBOR [Member] | Fund IV [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Borrowings, interest rate basis spread | 1.65%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Unsecured Debt [Member] | Line of Credit [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Mortgage and other notes payable | 0 us-gaap_LongTermDebt / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |  | 0 us-gaap_LongTermDebt / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |
Unsecured Debt [Member] | Line of Credit [Member] | LIBOR [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Borrowings, interest rate basis spread | 1.40%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Unsecured Debt [Member] | Unsecured Credit Facility [Member] | Line of Credit [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Proceeds from lines of credit | 15,000,000 us-gaap_ProceedsFromLinesOfCredit / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |  |  |
Repayments of debt | 15,000,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |  |  |
Amount borrowed | 0 us-gaap_LineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |  |  |
Unsecured Debt [Member] | Unsecured Credit Facility [Member] | Line of Credit [Member] | LIBOR [Member] | January 31, 2016 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Borrowings, interest rate basis spread | 1.55%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodOneMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Unused capacity fee percentage | 0.35%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodOneMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Unsecured Debt [Member] | Unsecured Credit Facility [Member] | Line of Credit [Member] | LIBOR [Member] | January 31, 2018 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Borrowings, interest rate basis spread | 1.40%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodTwoMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Unused capacity fee percentage | 0.25%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodTwoMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Unsecured Debt [Member] | Unsecured Credit Facility [Member] | Line of Credit [Member] | LIBOR [Member] | November 25, 2018 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Borrowings, interest rate basis spread | 1.40%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodThreeMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Unsecured Debt [Member] | Unsecured Credit Facility [Member] | Line of Credit [Member] | LIBOR [Member] | November 25, 2019 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Borrowings, interest rate basis spread | 1.30%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodFourMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |  |  |
Unsecured Debt [Member] | Unsecured Credit Facility, Term Loan [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Mortgage and other notes payable | 50,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityTermLoanMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |  |  |
Unsecured Debt [Member] | Unsecured Credit Facility, Term Loan [Member] | November 25, 2018 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Mortgage and other notes payable | 50,000,000 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityTermLoanMember / us-gaap_DebtInstrumentRedemptionPeriodAxis = us-gaap_DebtInstrumentRedemptionPeriodThreeMember / us-gaap_LongtermDebtTypeAxis = us-gaap_UnsecuredDebtMember |  |  |
Line of Credit [Member] | Subscription Line [Member] | Line of Credit [Member] | Fund IV [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Repayments of debt | 103,900,000 us-gaap_RepaymentsOfLongTermDebt / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_SubscriptionLineMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |  |  |
Borrowings, amount | 112,200,000.0 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_SubscriptionLineMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |  |  |
Mortgage and other notes payable | $ 77,100,000 us-gaap_LongTermDebt / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_SubscriptionLineMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |  |  |
[1] | The Fund IV revolving subscription line of credit is secured by unfunded investor capital commitments.

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions 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://www.xbrl.org/2003/role/presentationRef -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=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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=6879938&loc=d3e572229-122910 + Details
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- 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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -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=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph f -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The net cash inflow or cash outflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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