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SEGMENT REPORTING Income Statement (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 segment | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments |  |  |  |  |  |  |  |  | 3 us-gaap_NumberOfReportableSegments |  |
Revenues | $ 51,156 us-gaap_RealEstateRevenueNet | $ 47,660 us-gaap_RealEstateRevenueNet | $ 49,511 us-gaap_RealEstateRevenueNet | $ 46,685 us-gaap_RealEstateRevenueNet | $ 44,102 us-gaap_RealEstateRevenueNet | $ 41,085 us-gaap_RealEstateRevenueNet | $ 40,808 us-gaap_RealEstateRevenueNet | $ 42,291 us-gaap_RealEstateRevenueNet | $ 195,012 us-gaap_RealEstateRevenueNet | $ 168,286 us-gaap_RealEstateRevenueNet | $ 114,987 us-gaap_RealEstateRevenueNet
Property operating expenses, other operating and real estate taxes |  |  |  |  |  |  |  |  | (51,671)akr_PropertyOperatingExpensesAndRealEstateTaxes | (46,553)akr_PropertyOperatingExpensesAndRealEstateTaxes | (37,716)akr_PropertyOperatingExpensesAndRealEstateTaxes
Reserve for notes receivable |  |  |  |  |  |  |  |  | 0 us-gaap_ProvisionForLoanLeaseAndOtherLosses | 0 us-gaap_ProvisionForLoanLeaseAndOtherLosses | (405)us-gaap_ProvisionForLoanLeaseAndOtherLosses
General and administrative expenses |  |  |  |  |  |  |  |  | (27,433)us-gaap_GeneralAndAdministrativeExpense | (25,555)us-gaap_GeneralAndAdministrativeExpense | (21,223)us-gaap_GeneralAndAdministrativeExpense
Depreciation and amortization |  |  |  |  |  |  |  |  | (49,645)us-gaap_DepreciationAndAmortization | (40,299)us-gaap_DepreciationAndAmortization | (27,888)us-gaap_DepreciationAndAmortization
Operating income |  |  |  |  |  |  |  |  | 66,263 us-gaap_OperatingIncomeLoss | 55,879 us-gaap_OperatingIncomeLoss | 27,755 us-gaap_OperatingIncomeLoss
Equity in (losses) earnings of unconsolidated affiliates |  |  |  |  |  |  |  |  | 8,723 us-gaap_IncomeLossFromEquityMethodInvestments | 12,382 us-gaap_IncomeLossFromEquityMethodInvestments | 550 us-gaap_IncomeLossFromEquityMethodInvestments
Gain on disposition of properties of unconsolidated affiliates |  |  |  |  |  |  |  |  | 102,855 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal | 0 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal | 3,061 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
Impairment of unconsolidated affiliates |  |  |  |  |  |  |  |  | 0 us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment | 0 us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment | (2,032)us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
Impairment of asset |  |  |  |  |  |  |  |  | 0 us-gaap_AssetImpairmentCharges | (1,500)us-gaap_AssetImpairmentCharges | 0 us-gaap_AssetImpairmentCharges
Loss on debt extinguishment |  |  |  |  |  |  |  |  | (335)us-gaap_GainsLossesOnExtinguishmentOfDebt | (765)us-gaap_GainsLossesOnExtinguishmentOfDebt | (198)us-gaap_GainsLossesOnExtinguishmentOfDebt
Gain on involuntary conversion of asset |  |  |  |  |  |  |  |  | 0 akr_GainLossOnInvoluntaryAssetConversion | 0 akr_GainLossOnInvoluntaryAssetConversion | 2,368 akr_GainLossOnInvoluntaryAssetConversion
Interest and other finance expense |  |  |  |  |  |  |  |  | (39,091)us-gaap_InterestAndDebtExpense | (39,474)us-gaap_InterestAndDebtExpense | (22,811)us-gaap_InterestAndDebtExpense
Gain on disposition of property |  |  |  |  |  |  |  |  | 13,138 us-gaap_GainLossOnSaleOfPropertyPlantEquipment | 0 us-gaap_GainLossOnSaleOfPropertyPlantEquipment | 0 us-gaap_GainLossOnSaleOfPropertyPlantEquipment
Income tax (provision) benefit |  |  |  |  |  |  |  |  | (629)us-gaap_IncomeTaxExpenseBenefit | (19)us-gaap_IncomeTaxExpenseBenefit | 574 us-gaap_IncomeTaxExpenseBenefit
Income from continuing operations |  |  |  |  |  |  |  |  | 150,924 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 26,503 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | 9,267 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
Discontinued operations |  |  |  |  |  |  |  |  |  |  |
Operating income from discontinued operations |  |  |  |  |  |  |  |  | 0 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 6,818 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | 12,007 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
Impairment of asset |  |  |  |  |  |  |  |  | 0 us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf | (6,683)us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf | 0 us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
Loss on debt extinguishment |  |  |  |  |  |  |  |  | 0 akr_DiscontinuedOperationsGainLossOnExtinguishmentOfDebt | (800)akr_DiscontinuedOperationsGainLossOnExtinguishmentOfDebt | (2,541)akr_DiscontinuedOperationsGainLossOnExtinguishmentOfDebt
Gain on disposition of properties |  |  |  |  |  |  |  |  | 1,222 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax | 18,802 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax | 71,203 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Income from discontinued operations |  |  |  |  |  |  |  |  | 1,222 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 18,137 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 80,669 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax
Net income |  |  |  |  |  |  |  |  | 152,146 us-gaap_ProfitLoss | 44,640 us-gaap_ProfitLoss | 89,936 us-gaap_ProfitLoss
Noncontrolling interests |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  |  |  |  |  |  |  |  | (80,059)us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity | 7,523 us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity | 14,352 us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity
Income from discontinued operations |  |  |  |  |  |  |  |  | (1,023)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest | (12,048)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest | (64,582)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | (81,082)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (4,525)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (50,230)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net income attributable to Common Shareholders | 9,441 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 28,564 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 11,464 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 21,595 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 12,251 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 9,484 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 8,757 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 9,623 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 71,064 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 40,115 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 39,706 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Core Portfolio [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 125,022 us-gaap_RealEstateRevenueNet / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 110,355 us-gaap_RealEstateRevenueNet / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 70,400 us-gaap_RealEstateRevenueNet / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Property operating expenses, other operating and real estate taxes |  |  |  |  |  |  |  |  | (33,097)akr_PropertyOperatingExpensesAndRealEstateTaxes / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (29,040)akr_PropertyOperatingExpensesAndRealEstateTaxes / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (21,817)akr_PropertyOperatingExpensesAndRealEstateTaxes / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Reserve for notes receivable |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
General and administrative expenses |  |  |  |  |  |  |  |  | (24,853)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (24,387)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (19,578)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Depreciation and amortization |  |  |  |  |  |  |  |  | (35,875)us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (28,989)us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (17,065)us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Operating income |  |  |  |  |  |  |  |  | 31,197 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 27,939 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 11,940 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Equity in (losses) earnings of unconsolidated affiliates |  |  |  |  |  |  |  |  | (77)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (99)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 262 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Gain on disposition of properties of unconsolidated affiliates |  |  |  |  |  |  |  |  | 0 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember |  | 0 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Impairment of unconsolidated affiliates |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Impairment of asset |  |  |  |  |  |  |  |  |  | (1,500)us-gaap_AssetImpairmentCharges / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember |
Loss on debt extinguishment |  |  |  |  |  |  |  |  | (3)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (309)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 0 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Gain on involuntary conversion of asset |  |  |  |  |  |  |  |  |  |  | 2,368 akr_GainLossOnInvoluntaryAssetConversion / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Interest and other finance expense |  |  |  |  |  |  |  |  | (27,021)us-gaap_InterestAndDebtExpense / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (26,158)us-gaap_InterestAndDebtExpense / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (15,431)us-gaap_InterestAndDebtExpense / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Gain on disposition of property |  |  |  |  |  |  |  |  | 12,577 us-gaap_GainLossOnSaleOfPropertyPlantEquipment / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember |  |
Income tax (provision) benefit |  |  |  |  |  |  |  |  | (176)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 131 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (241)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Income from continuing operations |  |  |  |  |  |  |  |  | 16,497 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 4 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (1,102)us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Discontinued operations |  |  |  |  |  |  |  |  |  |  |
Operating income from discontinued operations |  |  |  |  |  |  |  |  |  | 535 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 319 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Impairment of asset |  |  |  |  |  |  |  |  |  | 0 us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember |
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  | (145)akr_DiscontinuedOperationsGainLossOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 0 akr_DiscontinuedOperationsGainLossOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Gain on disposition of properties |  |  |  |  |  |  |  |  | 0 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 6,488 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 0 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Income from discontinued operations |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 6,878 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 319 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Net income |  |  |  |  |  |  |  |  | 16,497 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 6,882 us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (783)us-gaap_ProfitLoss / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Noncontrolling interests |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  |  |  |  |  |  |  |  | (3,213)us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (1,002)us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 60 us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Income from discontinued operations |  |  |  |  |  |  |  |  | (9)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (2,406)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (128)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | (3,222)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (3,408)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (68)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Net income attributable to Common Shareholders |  |  |  |  |  |  |  |  | 13,275 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | 3,474 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember | (851)us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = akr_CorePortfolioMember
Opportunity Funds [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 54,659 us-gaap_RealEstateRevenueNet / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 46,131 us-gaap_RealEstateRevenueNet / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 36,560 us-gaap_RealEstateRevenueNet / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Property operating expenses, other operating and real estate taxes |  |  |  |  |  |  |  |  | (18,574)akr_PropertyOperatingExpensesAndRealEstateTaxes / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (17,513)akr_PropertyOperatingExpensesAndRealEstateTaxes / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (15,899)akr_PropertyOperatingExpensesAndRealEstateTaxes / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Reserve for notes receivable |  |  |  |  |  |  |  |  |  |  | 0 us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
General and administrative expenses |  |  |  |  |  |  |  |  | (1,665)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (1,168)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (1,645)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Depreciation and amortization |  |  |  |  |  |  |  |  | (13,770)us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (11,310)us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (10,823)us-gaap_DepreciationAndAmortization / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Operating income |  |  |  |  |  |  |  |  | 20,650 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 16,140 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 8,193 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Equity in (losses) earnings of unconsolidated affiliates |  |  |  |  |  |  |  |  | 8,800 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 12,481 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 288 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Gain on disposition of properties of unconsolidated affiliates |  |  |  |  |  |  |  |  | 102,855 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember |  | 3,061 us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Impairment of unconsolidated affiliates |  |  |  |  |  |  |  |  |  |  | (2,032)us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Impairment of asset |  |  |  |  |  |  |  |  |  | 0 us-gaap_AssetImpairmentCharges / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember |
Loss on debt extinguishment |  |  |  |  |  |  |  |  | (332)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (456)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (198)us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Gain on involuntary conversion of asset |  |  |  |  |  |  |  |  |  |  | 0 akr_GainLossOnInvoluntaryAssetConversion / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Interest and other finance expense |  |  |  |  |  |  |  |  | (12,070)us-gaap_InterestAndDebtExpense / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (13,316)us-gaap_InterestAndDebtExpense / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (7,380)us-gaap_InterestAndDebtExpense / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Gain on disposition of property |  |  |  |  |  |  |  |  | 561 us-gaap_GainLossOnSaleOfPropertyPlantEquipment / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember |  |
Income tax (provision) benefit |  |  |  |  |  |  |  |  | (453)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (150)us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 815 us-gaap_IncomeTaxExpenseBenefit / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Income from continuing operations |  |  |  |  |  |  |  |  | 120,011 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 14,699 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 2,747 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Discontinued operations |  |  |  |  |  |  |  |  |  |  |
Operating income from discontinued operations |  |  |  |  |  |  |  |  |  | 6,283 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 11,688 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Impairment of asset |  |  |  |  |  |  |  |  |  | (6,683)us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember |
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  | (655)akr_DiscontinuedOperationsGainLossOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (2,541)akr_DiscontinuedOperationsGainLossOnExtinguishmentOfDebt / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Gain on disposition of properties |  |  |  |  |  |  |  |  | 1,222 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 12,314 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 71,203 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Income from discontinued operations |  |  |  |  |  |  |  |  | 1,222 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 11,259 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 80,350 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
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Noncontrolling interests |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  |  |  |  |  |  |  |  | (76,846)us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 8,525 us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 14,292 us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Income from discontinued operations |  |  |  |  |  |  |  |  | (1,014)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (9,642)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (64,454)us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | (77,860)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (1,117)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | (50,162)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Net income attributable to Common Shareholders |  |  |  |  |  |  |  |  | 43,373 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 24,841 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember | 32,935 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = akr_OpportunityFundsMember
Notes Receivable [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 15,331 us-gaap_RealEstateRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 11,800 us-gaap_RealEstateRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 8,027 us-gaap_RealEstateRevenueNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember
Property operating expenses, other operating and real estate taxes |  |  |  |  |  |  |  |  | 0 akr_PropertyOperatingExpensesAndRealEstateTaxes / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 akr_PropertyOperatingExpensesAndRealEstateTaxes / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 akr_PropertyOperatingExpensesAndRealEstateTaxes / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember
Reserve for notes receivable |  |  |  |  |  |  |  |  |  |  | (405)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember
General and administrative expenses |  |  |  |  |  |  |  |  | (915)us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 us-gaap_GeneralAndAdministrativeExpense / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember
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Operating income |  |  |  |  |  |  |  |  | 14,416 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 11,800 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 7,622 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember
Equity in (losses) earnings of unconsolidated affiliates |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember
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Discontinued operations |  |  |  |  |  |  |  |  |  |  |
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Noncontrolling interests |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember
Income from discontinued operations |  |  |  |  |  |  |  |  | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember
Net income attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember
Net income attributable to Common Shareholders |  |  |  |  |  |  |  |  | $ 14,416 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | $ 11,800 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember | $ 7,622 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic / us-gaap_StatementBusinessSegmentsAxis = us-gaap_NotesReceivableMember

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- Definition Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.12) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.14) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Article 5 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
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