XML 32 R87.htm IDEA: XBRL DOCUMENT v2.4.1.9
COMMITMENTS AND CONTINGENCIES (Details) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 12 Months Ended
Aug. 31, 2009
Dec. 31, 2014
Breach of Severance Agreement [Member]    
Loss Contingencies [Line Items]    
Loss contingency, damages sought, value $ 0.9us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= akr_BreachOfSeveranceAgreementMember		  
Contract Terminated with Cause Prior To Completion [Member]    
Loss Contingencies [Line Items]    
Loss contingency, damages sought, value   $ 7.4us-gaap_LossContingencyDamagesSoughtValue
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= akr_ContractTerminatedwithCausePriorToCompletionMember