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FEDERAL INCOME TAXES Tax Status of Dividends (Details) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Abstract] |  |  |
Required Distribution Rate to Maintain REIT Status (in percent) | 90.00%akr_RequiredDistributionRateToMaintainReitStatus |  |
Ordinary income | 69.00%akr_AllocationOfDividendsOrdinaryIncomePercent | 87.00%akr_AllocationOfDividendsOrdinaryIncomePercent | 63.00%akr_AllocationOfDividendsOrdinaryIncomePercent
Qualified dividend | 0.00%akr_AllocationOfDividendsQualifiedDividendPercent | 0.00%akr_AllocationOfDividendsQualifiedDividendPercent | 0.00%akr_AllocationOfDividendsQualifiedDividendPercent
Capital gain | 31.00%akr_AllocationOfDividendsCapitalGainPercent | 13.00%akr_AllocationOfDividendsCapitalGainPercent | 37.00%akr_AllocationOfDividendsCapitalGainPercent
Total | 100.00%akr_AllocationOfDividendsPercent | 100.00%akr_AllocationOfDividendsPercent | 100.00%akr_AllocationOfDividendsPercent

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- Definition Allocation Of Dividends, Capital Gain, Percent + References No definition available. + Details
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- Definition Allocation Of Dividends, Ordinary Income, Percent + References No definition available. + Details
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- Definition Required Distribution Rate to Maintain REIT Status + References No definition available. + Details
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- Details
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