XML 36 R44.htm IDEA: XBRL DOCUMENT v2.4.1.9
Financial Instruments: Derivatives and Hedging (Details) (USD $)
0 Months Ended 12 Months Ended
Aug. 26, 2013
Sep. 27, 2012
Dec. 31, 2014
BMO Interest Rate Swap      
Financial Instruments: Derivatives and Hedging      
Fair Value     $ 7,300,000us-gaap_InterestRateCashFlowHedgeLiabilityAtFairValue
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2013Member
BMO Interest Rate Swap | Cash flow hedges      
Financial Instruments: Derivatives and Hedging      
Term pursuant to interest rate swap agreement 7 years    
Notional Value     220,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2013Member
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Strike Rate (as a percent)     2.32%us-gaap_DerivativeFixedInterestRate
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2013Member
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Fair Value     (7,268,000)us-gaap_InterestRateCashFlowHedgeDerivativeAtFairValueNet
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2013Member
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
BAML Interest Rate Swap      
Financial Instruments: Derivatives and Hedging      
Fair Value     3,000,000us-gaap_InterestRateCashFlowHedgeAssetAtFairValue
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2012Member
BAML Interest Rate Swap | Cash flow hedges      
Financial Instruments: Derivatives and Hedging      
Term pursuant to interest rate swap agreement   5 years  
Notional Value     400,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2012Member
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Strike Rate (as a percent)     0.75%us-gaap_DerivativeFixedInterestRate
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2012Member
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Fair Value     3,020,000us-gaap_InterestRateCashFlowHedgeDerivativeAtFairValueNet
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2012Member
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
BMO and BAML Interest Rate Swaps | Cash flow hedges      
Financial Instruments: Derivatives and Hedging      
Unrealized gains or losses on derivative financial instruments in accumulated other comprehensive income     7,500,000us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2013And2012CombinedMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Interest reclassified from accumulated other comprehensive income into interest expense     7,200,000us-gaap_InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2013And2012CombinedMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember
Amount estimated to be reclassified into earnings within next 12 months     $ 200,000us-gaap_InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet
/ us-gaap_DerivativeInstrumentRiskAxis
= fsp_InterestRateSwap2013And2012CombinedMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_CashFlowHedgingMember