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DIVIDENDS AND DISTRIBUTIONS PAYABLE (Details) (USD $) | 3 Months Ended | 12 Months Ended | 0 Months Ended
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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 | Dec. 31, 2013 | Dec. 31, 2012 | Nov. 04, 2014 | Dec. 05, 2014
Dividends, Common Stock [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared per Common Share (in dollars per share) | $ 0.54 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.23 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.23 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.23 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.23 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.21 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.21 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.21 us-gaap_CommonStockDividendsPerShareDeclared | $ 1.23 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.86 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.72 us-gaap_CommonStockDividendsPerShareDeclared |  |
Regular Quarterly Cash Dividend [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends, Common Stock [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared per Common Share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | $ 0.24 us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = akr_RegularQuarterlyCashDividendMember |
Special Cash Dividend [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends, Common Stock [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared per Common Share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.30 us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = akr_SpecialCashDividendMember

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Details
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- Details
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- Details
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