Summary Of Significant Accounting Policies (Variable Interest Entities) (Details) (USD $)
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0 Months Ended |
12 Months Ended |
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Oct. 16, 2006
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Dec. 31, 2014
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Dec. 31, 2013
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Oct. 16, 2023
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Oct. 16, 2021
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Dec. 30, 2011
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Variable Interest Entity [Line Items] |
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Mortgages payable |
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563,698,000us-gaap_SecuredDebt |
$ 588,456,000us-gaap_SecuredDebt |
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Real estate, net |
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4,141,948,000us-gaap_RealEstateInvestmentPropertyNet |
3,798,992,000us-gaap_RealEstateInvestmentPropertyNet |
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Melville Mall |
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Variable Interest Entity [Line Items] |
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Master lease term |
20 years |
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Mortgages payable |
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20,700,000us-gaap_SecuredDebt / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_MelvilleMallMember |
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Real estate, net |
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61,900,000us-gaap_RealEstateInvestmentPropertyNet / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_MelvilleMallMember |
62,600,000us-gaap_RealEstateInvestmentPropertyNet / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_MelvilleMallMember |
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Melville Mall | Scenario, Forecast |
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Variable Interest Entity [Line Items] |
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Purchase price under option |
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5,000,000frt_PurchasePriceUnderOption / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_MelvilleMallMember |
5,000,000frt_PurchasePriceUnderOption / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_MelvilleMallMember |
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Plaza El Segundo |
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Variable Interest Entity [Line Items] |
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Mortgages payable |
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180,300,000us-gaap_SecuredDebt / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_PlazaElSegundoMember |
182,100,000us-gaap_SecuredDebt / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_PlazaElSegundoMember |
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Real estate, net |
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178,100,000us-gaap_RealEstateInvestmentPropertyNet / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_PlazaElSegundoMember |
183,400,000us-gaap_RealEstateInvestmentPropertyNet / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_PlazaElSegundoMember |
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Ownership percentage |
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48.20%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_PlazaElSegundoMember |
Maximum exposure to loss |
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19,500,000frt_RealEstateMaximumExposureToLoss / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_PlazaElSegundoMember |
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The Grove at Shrewsbury (East) |
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Variable Interest Entity [Line Items] |
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Mortgages payable |
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7,400,000us-gaap_SecuredDebt / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_GroveatShrewsburyEastMember |
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Real estate, net |
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15,700,000us-gaap_RealEstateInvestmentPropertyNet / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_GroveatShrewsburyEastMember |
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Second Mortgage | Melville Mall |
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Variable Interest Entity [Line Items] |
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Mortgages payable |
34,200,000us-gaap_SecuredDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_SecondMortgageMember / us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis = frt_MelvilleMallMember |
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Darien |
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Variable Interest Entity [Line Items] |
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Maximum period of sale to defer gain on sale of other property, days |
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180 days |
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