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EARNINGS PER COMMON SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Numerator |  |  |
Income from continuing operations | $ 16,547 us-gaap_IncomeLossFromContinuingOperations | $ 21,595 us-gaap_IncomeLossFromContinuingOperations |
Less: net income attributable to participating securities | (240)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted | (392)us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted |
Income from continuing operations, net of income attributable to participating securities | $ 16,307 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ 21,203 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted |
Denominator |  |  |
Weighted average shares for basic earnings per share (in shares) | 68,295,000 us-gaap_WeightedAverageNumberOfSharesIssuedBasic | 55,953,000 us-gaap_WeightedAverageNumberOfSharesIssuedBasic |
Effect of dilutive securities: |  |  |
Employee Restricted Share Units and share options (in shares) | 40,000 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 40,000 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements |
Convertible Preferred OP Units (in shares) | 25,000 us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock | 25,000 us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock |
Denominator for diluted earnings per share (in shares) | 68,360,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 56,018,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
Earnings Per Share, Diluted, Undistributed | $ 0.24 us-gaap_EarningsPerShareDilutedUndistributed | $ 0.38 us-gaap_EarningsPerShareDilutedUndistributed |
Common stock |  |  |
Schedule of Earnings Per Share, Basic and Diluted [Line Items] |  |  |
Antidilutive securities excluded from computation of earnings per share, amount (in shares) | 25,067 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 25,067 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
Operating Partnership, as General Partner or Managing Member |  |  |
Schedule of Earnings Per Share, Basic and Diluted [Line Items] |  |  |
Limited partners' common OP units (in shares) | 2,975,277 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = akr_OperatingPartnershipAsGeneralPartnerOrManagingMemberMember |  | 2,988,277 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = akr_OperatingPartnershipAsGeneralPartnerOrManagingMemberMember
Operating Partnership, as General Partner or Managing Member | Series A Preferred Stock |  |  |
Schedule of Earnings Per Share, Basic and Diluted [Line Items] |  |  |
Limited partners' common OP units (in shares) | 188 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = akr_OperatingPartnershipAsGeneralPartnerOrManagingMemberMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember |  | 188 us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = akr_OperatingPartnershipAsGeneralPartnerOrManagingMemberMember / us-gaap_StatementClassOfStockAxis = us-gaap_SeriesAPreferredStockMember

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- Definition The earnings attributable to each security on the basis that all of the earnings for the period had been distributed (to the extent that each security may share in earnings). This is the earnings amount which reflects the participation rights in undistributed earnings of each security, after giving effect to all dilutive potential common shares outstanding during the period. + References No definition available. + Details
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- Definition Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 + Details
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