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NOTES RECEIVABLE, PREFERRED EQUITY, AND OTHER REAL ESTATE RELATED INVESTMENTS Schedule of Notes Receivable and Preferred Equity Investments Reconciliation (Details) (USD $) In Thousands, unless otherwise specified | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Movement in Mortgage Loans on Real Estate [Roll Forward] |  |  |  |
Beginning Balance |  | $ 126,656 us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages | $ 129,278 us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages | $ 59,989 us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages
New investments |  | 31,169 us-gaap_MortgageLoansOnRealEstateNewMortgageLoans | 45,000 us-gaap_MortgageLoansOnRealEstateNewMortgageLoans | 108,629 us-gaap_MortgageLoansOnRealEstateNewMortgageLoans
Collections of principal | (1,200)us-gaap_MortgageLoansOnRealEstateCollectionsOfPrincipal | (18,095)us-gaap_MortgageLoansOnRealEstateCollectionsOfPrincipal | (29,583)us-gaap_MortgageLoansOnRealEstateCollectionsOfPrincipal | (25,388)us-gaap_MortgageLoansOnRealEstateCollectionsOfPrincipal
Conversion to real estate through receipt of deed or through foreclosure |  | (38,000)akr_MortgageLoansOnRealEstateConversionOfRealEstate | (18,500)akr_MortgageLoansOnRealEstateConversionOfRealEstate | (14,000)akr_MortgageLoansOnRealEstateConversionOfRealEstate
Non-cash accretion of notes receivable |  | 556 akr_NoncashAccretionOfNotesReceivable | 461 akr_NoncashAccretionOfNotesReceivable | 453 akr_NoncashAccretionOfNotesReceivable
Reserves |  | 0 akr_MortgageLoansonRealEstateReserveAmount | 0 akr_MortgageLoansonRealEstateReserveAmount | (405)akr_MortgageLoansonRealEstateReserveAmount
Ending Balance |  | $ 102,286 us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages | $ 126,656 us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages | $ 129,278 us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages

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- Definition The carrying amount of the outstanding balance due under the mortgage loan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition The amount of principal collected on mortgage loans on real estate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.6) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition Total amount of new mortgage loans on real estate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.6) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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