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v2.4.1.9

Dispositions and Discontinued Operations (Details) (USD $) | 12 Months Ended | 0 Months Ended | 3 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Oct. 29, 2013 | Dec. 21, 2012 | Sep. 30, 2012
Operating results for the asset held for sale |  |  |  |  |  |
Rental revenue | $ 243,341,000 us-gaap_RealEstateRevenueNet | $ 206,926,000 us-gaap_RealEstateRevenueNet | $ 150,434,000 us-gaap_RealEstateRevenueNet |  |  |
Rental operating expenses | (62,032,000)us-gaap_CostOfRealEstateRevenue | (51,100,000)us-gaap_CostOfRealEstateRevenue | (37,440,000)us-gaap_CostOfRealEstateRevenue |  |  |
Real estate taxes and insurance | (36,857,000)us-gaap_RealEstateTaxesAndInsurance | (31,616,000)us-gaap_RealEstateTaxesAndInsurance | (22,904,000)us-gaap_RealEstateTaxesAndInsurance |  |  |
Depreciation and amortization | (95,915,000)us-gaap_DepreciationAndAmortization | (78,839,000)us-gaap_DepreciationAndAmortization | (54,051,000)us-gaap_DepreciationAndAmortization |  |  |
Net income (loss) from discontinued operations |  | 375,000 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax | (491,000)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax |  |  |
Discontinued operations |  |  |  |  |  |
Operating results for the asset held for sale |  |  |  |  |  |
Rental revenue |  | 991,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | 2,334,000 us-gaap_RealEstateRevenueNet / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |  |
Rental operating expenses |  |  | (1,089,000)us-gaap_CostOfRealEstateRevenue / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |  |
Real estate taxes and insurance |  |  | (340,000)us-gaap_RealEstateTaxesAndInsurance / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |  |
Depreciation and amortization |  | (616,000)us-gaap_DepreciationAndAmortization / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (1,396,000)us-gaap_DepreciationAndAmortization / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |  |
Net income (loss) from discontinued operations |  | 375,000 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | (491,000)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |  |
Discontinued operations | Commercial property in Richardson, Texas |  |  |  |  |  |
Discontinued operations |  |  |  |  |  |
Gain (Loss) on sale of properties |  |  |  | 2,200,000 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = fsp_OfficePropertyInRichardsonTexasMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |
Discontinued operations | Commercial property in Southfield, Michigan |  |  |  |  |  |
Discontinued operations |  |  |  |  |  |
Gain (Loss) on sale of properties |  |  |  |  | (14,800,000)us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = fsp_OfficePropertyInSouthfieldMichiganMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Expected term for sale of property |  |  |  |  |  | 1 year
Provision for loss on a property held for sale net of applicable income tax |  |  |  |  |  | 14,300,000 us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = fsp_OfficePropertyInSouthfieldMichiganMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember
Sale price of properties sold |  |  |  |  | 300,000 fsp_RealEstateAggregateSalesPriceOfRealEstateSold / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = fsp_OfficePropertyInSouthfieldMichiganMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember |
Assets held for sale |  |  |  |  |  |
Assets held for sale |  |  |  |  |  | $ 700,000 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation / us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis = fsp_OfficePropertyInSouthfieldMichiganMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember

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- Definition This element represents the total of the costs related to real estate revenues, including management, leasing, and development services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value. + References No definition available. + Details
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- Definition The aggregate revenue from real estate operations during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Definition The aggregate total of real estate taxes and insurance expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.6) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6419918&loc=d3e35301-107843 + Details
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