XML 42 R61.htm IDEA: XBRL DOCUMENT v2.4.1.9
Debt (Summary Of Debt Outstanding) (Details) (USD $)
In Thousands, unless otherwise specified
 8 Months Ended
Aug. 27, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 15, 2014
Jun. 02, 2014
Nov. 14, 2014
Debt Instrument [Line Items]            
Mortgages payable   $ 563,698us-gaap_SecuredDebt $ 588,456us-gaap_SecuredDebt      
Notes payable   290,519us-gaap_NotesPayable 300,822us-gaap_NotesPayable      
Senior notes and debentures   1,483,813us-gaap_SeniorNotes 1,360,913us-gaap_SeniorNotes      
Capital lease obligations   71,647us-gaap_CapitalLeaseObligations 71,671us-gaap_CapitalLeaseObligations      
Total debt and capital lease obligations   2,409,677us-gaap_DebtAndCapitalLeaseObligations 2,321,862us-gaap_DebtAndCapitalLeaseObligations      
THE AVENUE at White Marsh            
Debt Instrument [Line Items]            
Interest rate       3.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_THEAVENUEatWhiteMarshDue2021Member		    
Brook 35            
Debt Instrument [Line Items]            
Interest rate         4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_Brook35Member		  
Term loan            
Debt Instrument [Line Items]            
Variable Interest Rate 1.30%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_DebtInstrumentAxis
= frt_TermLoanMember		          
4.50% notes            
Debt Instrument [Line Items]            
Principal balance           250,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_SeniorNotes4Point50PercentMember		 [1]
Interest rate           4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_SeniorNotes4Point50PercentMember
Mortgages Payable            
Debt Instrument [Line Items]            
Principal balance   554,865us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 578,491us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Net unamortized premium (discount)   8,833us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 9,965us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Mortgages Payable | Melville Mall            
Debt Instrument [Line Items]            
Principal balance   0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_MelvilleMallMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 20,705us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_MelvilleMallMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   5.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_MelvilleMallMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | THE AVENUE at White Marsh            
Debt Instrument [Line Items]            
Principal balance   0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_THEAVENUEatWhiteMarshDue2015Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 54,112us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_THEAVENUEatWhiteMarshDue2015Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   5.46%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_THEAVENUEatWhiteMarshDue2015Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Barracks Road            
Debt Instrument [Line Items]            
Principal balance   35,985us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_BarracksRoadMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 37,069us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_BarracksRoadMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   7.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_BarracksRoadMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Hauppauge            
Debt Instrument [Line Items]            
Principal balance   13,566us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_HauppaugeMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 13,974us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_HauppaugeMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   7.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_HauppaugeMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Lawrence Park            
Debt Instrument [Line Items]            
Principal balance   25,507us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_LawrenceParkMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 26,275us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_LawrenceParkMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   7.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_LawrenceParkMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Wildwood            
Debt Instrument [Line Items]            
Principal balance   22,420us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_WildwoodMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 23,095us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_WildwoodMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   7.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_WildwoodMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Wynnewood            
Debt Instrument [Line Items]            
Principal balance   25,994us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_WynnewoodMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 26,777us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_WynnewoodMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   7.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_WynnewoodMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Brick Plaza            
Debt Instrument [Line Items]            
Principal balance   26,415us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_BrickPlazaMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 27,254us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_BrickPlazaMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   7.42%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_BrickPlazaMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | East Bay Bridge            
Debt Instrument [Line Items]            
Principal balance   0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_EastBayBridgeMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 61,980us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_EastBayBridgeMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   5.129%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_EastBayBridgeMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Plaza El Segundo            
Debt Instrument [Line Items]            
Principal balance   175,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_PlazaElSegundoMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 175,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_PlazaElSegundoMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   6.33%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_PlazaElSegundoMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | The Grove at Shrewsbury (East)            
Debt Instrument [Line Items]            
Principal balance   44,519us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_GroveatShrewsburyEastMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_GroveatShrewsburyEastMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   5.82%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_GroveatShrewsburyEastMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | The Grove at Shrewsbury (West)            
Debt Instrument [Line Items]            
Principal balance   11,242us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_GroveatShrewsburyWESTMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_GroveatShrewsburyWESTMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   6.38%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_GroveatShrewsburyWESTMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Rollingwood Apartments            
Debt Instrument [Line Items]            
Principal balance   22,130us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_RollingwoodApartmentsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 22,521us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_RollingwoodApartmentsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   5.54%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_RollingwoodApartmentsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | 29th Place            
Debt Instrument [Line Items]            
Principal balance   4,941us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_A29thPlaceMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 5,119us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_A29thPlaceMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   5.91%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_A29thPlaceMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | THE AVENUE at White Marsh            
Debt Instrument [Line Items]            
Principal balance   52,705us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_THEAVENUEatWhiteMarshDue2021Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_THEAVENUEatWhiteMarshDue2021Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   3.35%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_THEAVENUEatWhiteMarshDue2021Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Montrose Crossing            
Debt Instrument [Line Items]            
Principal balance   75,867us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_MontroseCrossingMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 77,341us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_MontroseCrossingMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   4.20%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_MontroseCrossingMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Brook 35            
Debt Instrument [Line Items]            
Principal balance   11,500us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Brook35Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Brook35Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   4.65%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_Brook35Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Mortgages Payable | Chelsea            
Debt Instrument [Line Items]            
Principal balance   7,074us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_ChelseaMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		 7,269us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_ChelseaMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		      
Interest rate   5.36%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_ChelseaMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SecuredDebtMember		        
Notes Payable            
Debt Instrument [Line Items]            
Notes payable   290,519us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		 300,822us-gaap_NotesPayable
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		      
Notes Payable | Escondido Promenade            
Debt Instrument [Line Items]            
Special Assessment Bond   9,400us-gaap_MunicipalDebtSecuritiesAtCarryingValue
/ us-gaap_DebtInstrumentAxis
= frt_EscondidoPromenadeMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		 9,400us-gaap_MunicipalDebtSecuritiesAtCarryingValue
/ us-gaap_DebtInstrumentAxis
= frt_EscondidoPromenadeMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		      
Notes Payable | Escondido (municipal bonds)            
Debt Instrument [Line Items]            
Interest rate   0.06%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= us-gaap_MunicipalBondsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		        
Notes Payable | Revolving credit facility            
Debt Instrument [Line Items]            
Revolving credit facility   0us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		 0us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		      
Notes Payable | Term loan            
Debt Instrument [Line Items]            
Other Notes Payable   275,000us-gaap_OtherNotesPayable
/ us-gaap_DebtInstrumentAxis
= frt_TermLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		 275,000us-gaap_OtherNotesPayable
/ us-gaap_DebtInstrumentAxis
= frt_TermLoanMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		      
Notes Payable | Various            
Debt Instrument [Line Items]            
Interest rate   11.31%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_VariousNotesPayableMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		        
Other Notes Payable   6,119us-gaap_OtherNotesPayable
/ us-gaap_DebtInstrumentAxis
= frt_VariousNotesPayableMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		 16,422us-gaap_OtherNotesPayable
/ us-gaap_DebtInstrumentAxis
= frt_VariousNotesPayableMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember		      
Senior Notes and Debentures            
Debt Instrument [Line Items]            
Principal balance   1,494,200us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 1,369,200us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Net unamortized premium (discount)   (10,387)us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 (8,287)us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Senior Notes and Debentures | 5.65% notes            
Debt Instrument [Line Items]            
Principal balance   0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior5Point65PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 125,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior5Point65PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Interest rate   5.65%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_Senior5Point65PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		        
Senior Notes and Debentures | 6.20% notes            
Debt Instrument [Line Items]            
Principal balance   200,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior620PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 200,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior620PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Interest rate   6.20%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_Senior620PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		        
Senior Notes and Debentures | 5.90% notes            
Debt Instrument [Line Items]            
Principal balance   150,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior590PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 150,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior590PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Interest rate   5.90%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_Senior590PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		        
Senior Notes and Debentures | 3.00% notes            
Debt Instrument [Line Items]            
Principal balance   250,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior300PercentnotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 250,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior300PercentnotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Interest rate   3.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_Senior300PercentnotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		        
Senior Notes and Debentures | 2.75% notes            
Debt Instrument [Line Items]            
Principal balance   275,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior2Point75PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 275,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior2Point75PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Interest rate   2.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_Senior2Point75PercentNotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		        
Senior Notes and Debentures | 3.95% notes            
Debt Instrument [Line Items]            
Principal balance   300,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior395percentnotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 300,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Senior395percentnotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Interest rate   3.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_Senior395percentnotesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		        
Senior Notes and Debentures | 7.48% debentures            
Debt Instrument [Line Items]            
Principal balance   29,200us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Debentures748PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 29,200us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_Debentures748PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Interest rate   7.48%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_Debentures748PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		        
Senior Notes and Debentures | 6.82% medium term notes            
Debt Instrument [Line Items]            
Principal balance   40,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_MediumTermNotes682PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 40,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_MediumTermNotes682PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Interest rate   6.82%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_MediumTermNotes682PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		        
Senior Notes and Debentures | 4.50% notes            
Debt Instrument [Line Items]            
Principal balance   $ 250,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_SeniorNotes4Point50PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 $ 0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= frt_SeniorNotes4Point50PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		      
Interest rate   4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= frt_SeniorNotes4Point50PercentMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		        
[1] The net proceeds from this note offering after issuance discounts, underwriting fees and other costs were approximately $244.6 million.