Schedule IV - Mortgage Loans on Real Estate (Details) (USD $)
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12 Months Ended |
0 Months Ended |
Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Aug. 04, 2006
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Mortgage Loans on Real Estate [Line Items] |
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Prior Liens |
$ 34,000,000us-gaap_MortgageLoansOnRealEstatePriorLiens1 |
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Face Amount of Mortgages |
51,942,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages |
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Carrying Amount of Mortgages |
50,988,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages |
[1] |
55,200,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages |
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Principal Amount of Loans Subject to delinquent Principal or Interest |
0us-gaap_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans |
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Mortgage Loans on Real Estate, Other Required Disclosures [Abstract] |
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Aggregate tax basis for Federal tax purposes |
51,900,000us-gaap_MortgageLoansOnRealEstateFederalIncomeTaxBasis1 |
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Interest rate |
9.00%us-gaap_MortgageLoansOnRealEstateInterestRate |
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9.00%us-gaap_MortgageLoansOnRealEstateInterestRate |
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Movement in Mortgage Loans on Real Estate [Roll Forward] |
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Balance at beginning of year |
55,155,000us-gaap_MortgageLoansOnRealEstate |
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55,648,000us-gaap_MortgageLoansOnRealEstate |
55,967,000us-gaap_MortgageLoansOnRealEstate |
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Issuance of loans |
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70,000us-gaap_MortgageLoansOnRealEstateNewMortgageLoans |
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Collection and satisfaction of loans |
(4,778,000)us-gaap_MortgageLoansOnRealEstateCollectionsOfPrincipal |
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(1,057,000)us-gaap_MortgageLoansOnRealEstateCollectionsOfPrincipal |
(1,161,000)us-gaap_MortgageLoansOnRealEstateCollectionsOfPrincipal |
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Amortization of discount |
611,000us-gaap_MortgageLoansOnRealEstateAmortizationOfPremium |
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564,000us-gaap_MortgageLoansOnRealEstateAmortizationOfPremium |
772,000us-gaap_MortgageLoansOnRealEstateAmortizationOfPremium |
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Balance at end of year |
50,988,000us-gaap_MortgageLoansOnRealEstate |
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55,155,000us-gaap_MortgageLoansOnRealEstate |
55,648,000us-gaap_MortgageLoansOnRealEstate |
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Mortgage On Retail Buildings in Philadelphia, PA, Loan One |
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Mortgage Loans on Real Estate [Line Items] |
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Prior Liens |
0us-gaap_MortgageLoansOnRealEstatePriorLiens1 / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanOneMember |
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Face Amount of Mortgages |
20,286,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanOneMember |
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Carrying Amount of Mortgages |
20,286,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanOneMember |
[2] |
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Principal Amount of Loans Subject to delinquent Principal or Interest |
0us-gaap_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanOneMember |
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Mortgage On Retail Buildings in Philadelphia, PA, Loan One | Interest Rate One |
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Mortgage Loans on Real Estate [Line Items] |
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Interest Rate |
8.00%frt_MortgageLoansOnRealEstateParticipationPlusInterestRateInterestRate / frt_InterestRateAxis = frt_InterestRateOneMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanOneMember |
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Mortgage On Retail Buildings in Philadelphia, PA, Loan One | Interest Rate Two |
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Mortgage Loans on Real Estate [Line Items] |
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Interest Rate |
10.00%frt_MortgageLoansOnRealEstateParticipationPlusInterestRateInterestRate / frt_InterestRateAxis = frt_InterestRateTwoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanOneMember |
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Mortgage On Retail Buildings in Philadelphia, PA, Loan One | Maximum |
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Mortgage Loans on Real Estate [Line Items] |
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Face Amount of Mortgages |
25,000,000.0us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanOneMember / us-gaap_RangeAxis = us-gaap_MaximumMember |
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Mortgage On Retail Buildings in Philadelphia, PA, Loan Two |
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Mortgage Loans on Real Estate [Line Items] |
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Prior Liens |
0us-gaap_MortgageLoansOnRealEstatePriorLiens1 / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanTwoMember |
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Face Amount of Mortgages |
9,250,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanTwoMember |
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Carrying Amount of Mortgages |
9,250,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanTwoMember |
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Principal Amount of Loans Subject to delinquent Principal or Interest |
0us-gaap_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanTwoMember |
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Interest Rate |
10.00%frt_MortgageLoansOnRealEstateParticipationPlusInterestRateInterestRate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageOnRetailBuildingsInPhiladelphiaPaLoanTwoMember |
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Second Mortgage On Hotel In San Jose, CA |
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Mortgage Loans on Real Estate [Line Items] |
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Prior Liens |
34,000,000us-gaap_MortgageLoansOnRealEstatePriorLiens1 / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_SecondMortgageOnHotelInSanJoseCaMember |
[3],[4] |
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Face Amount of Mortgages |
10,691,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_SecondMortgageOnHotelInSanJoseCaMember |
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11,900,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_SecondMortgageOnHotelInSanJoseCaMember |
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Carrying Amount of Mortgages |
9,737,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_SecondMortgageOnHotelInSanJoseCaMember |
[3] |
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Principal Amount of Loans Subject to delinquent Principal or Interest |
0us-gaap_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_SecondMortgageOnHotelInSanJoseCaMember |
[3] |
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Mortgage Loans on Real Estate, Other Required Disclosures [Abstract] |
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Interest rate |
9.00%us-gaap_MortgageLoansOnRealEstateInterestRate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_SecondMortgageOnHotelInSanJoseCaMember |
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14.00%us-gaap_MortgageLoansOnRealEstateInterestRate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_SecondMortgageOnHotelInSanJoseCaMember |
Amortization schedule, period |
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15 years |
Mortgage loan on a shopping center and an adjacent commercial building in Norwalk ,CT |
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Mortgage Loans on Real Estate [Line Items] |
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Prior Liens |
0us-gaap_MortgageLoansOnRealEstatePriorLiens1 / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageLoanOnShoppingCenterAndAdjacentCommercialBuildingInNorwalkCtMember |
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Face Amount of Mortgages |
11,715,000us-gaap_MortgageLoansOnRealEstateFaceAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageLoanOnShoppingCenterAndAdjacentCommercialBuildingInNorwalkCtMember |
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Carrying Amount of Mortgages |
11,715,000us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageLoanOnShoppingCenterAndAdjacentCommercialBuildingInNorwalkCtMember |
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Principal Amount of Loans Subject to delinquent Principal or Interest |
$ 0us-gaap_MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageLoanOnShoppingCenterAndAdjacentCommercialBuildingInNorwalkCtMember |
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Mortgage Loans on Real Estate, Other Required Disclosures [Abstract] |
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Interest rate |
7.00%us-gaap_MortgageLoansOnRealEstateInterestRate / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = frt_MortgageLoanOnShoppingCenterAndAdjacentCommercialBuildingInNorwalkCtMember |
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