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MORTGAGE AND OTHER NOTES PAYABLE (Details) (USD $) | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Mar. 31, 2015 extension_option | Mar. 31, 2015 | Dec. 31, 2014
Mortgage Loans on Real Estate [Line Items] |  |  |
Mortgage and other notes payable | $ 1,304,739,000 us-gaap_LongTermDebt | 1,304,739,000 us-gaap_LongTermDebt | $ 1,130,481,000 us-gaap_LongTermDebt
Number of Loan Extensions | 1 akr_NumberOfLoanExtensions | 1 akr_NumberOfLoanExtensions |
Length of Loan Extension | 6 years |  |
Unsecured credit facility | Line of Credit |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Mortgage and other notes payable | 50,000,000 us-gaap_LongTermDebt / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember | 50,000,000 us-gaap_LongTermDebt / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember |
New mortgage loans | 50,000,000.0 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember | 50,000,000.0 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember |
Unsecured credit facility | Line of Credit | Fund IV |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
New mortgage loans | 50,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember | 50,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |
Line of credit | 31,000,000 us-gaap_LongTermLineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember | 31,000,000 us-gaap_LongTermLineOfCredit / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember |
Unsecured credit facility | Line of Credit | Fund IV | LIBOR |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable rate |  | 2.75%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_CreditFacilityAxis = us-gaap_LineOfCreditMember / us-gaap_DebtInstrumentAxis = akr_UnsecuredCreditFacilityMember / us-gaap_StatementBusinessSegmentsAxis = akr_FundIvMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |
Convertible Debt [Member] |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Redemption of debt |  | 400,000 us-gaap_ExtinguishmentOfDebtAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_ConvertibleDebtMember |
Line of Credit | Subscription Line | Line of Credit | Fund IV |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |
Mortgage and other notes payable | 123,700,000 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 | 123,700,000 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 |
New mortgage loans | $ 46,600,000 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 | 46,600,000 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 |

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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 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 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://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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Line-of-Credit Arrangement -URI http://asc.fasb.org/extlink&oid=6517033 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=28361426&loc=d3e1314-112600 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=28361426&loc=d3e1336-112600 + Details
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