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ACQUIRED LEASE INTANGIBLES (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Acquired Lease Intangibles [Abstract] |  |
Total | $ 44,618 us-gaap_FiniteLivedIntangibleAssetsNet | $ 33,663 us-gaap_FiniteLivedIntangibleAssetsNet
Assets [Member] |  |
Acquired Lease Intangibles [Abstract] |  |
2015 | 6,687 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseFavorableMember |
2016 | 6,330 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseFavorableMember |
2017 | 5,126 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseFavorableMember |
2018 | 4,676 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseFavorableMember |
2019 | 4,119 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseFavorableMember |
Thereafter | 17,680 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseFavorableMember |
Total | 44,618 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseFavorableMember |
Liabilities [Member] |  |
Acquired Lease Intangibles [Abstract] |  |
2015 | 5,126 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseUnfavorableMember |
2016 | 4,932 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseUnfavorableMember |
2017 | 4,301 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseUnfavorableMember |
2018 | 3,705 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseUnfavorableMember |
2019 | 3,569 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseUnfavorableMember |
Thereafter | 7,952 us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseUnfavorableMember |
Total | $ 29,585 us-gaap_FiniteLivedIntangibleAssetsNet / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = akr_AcquiredIntangibleAssetsOffMarketLeaseUnfavorableMember |

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