$FSP
Franklin Street Properties Corp Stock $fsp

$fsp Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000110465913011834 Filed on February 19, 2013

Income Statement

Concept	2011 Q4	2011 Q3	2011 Q2
Revenue	$37.82M	$34.44M	$34.49M
YoY Change	23.77%	15.31%	24.9%
Cost Of Revenue	$9.480M	$8.890M	$7.970M
YoY Change	-1.25%	2.07%	8.58%
Gross Profit	$28.05M	$25.55M	$26.18M
YoY Change	33.89%	20.75%	29.09%
Gross Profit Margin	74.16%	74.18%	75.91%
Selling, General & Admin	$7.310M	$1.654M	$6.650M
YoY Change	19.25%	-72.62%	12.9%
% of Gross Profit	26.06%	6.47%	25.4%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$13.70M	$12.90M	$12.60M
YoY Change	30.48%	22.86%	35.48%
% of Gross Profit	48.84%	50.49%	48.13%
Operating Expenses	$20.06M	$1.654M	$18.39M
YoY Change	26.72%	-89.42%	28.33%
Operating Profit	$7.990M	$3.347M	$7.790M
YoY Change	56.05%	-39.48%	30.92%
Interest Expense	-$2.280M	$3.419M	-$2.410M
YoY Change	28.81%	-331.01%	78.52%
% of Operating Profit	-28.54%	102.15%	-30.94%
Other Income/Expense, Net
YoY Change
Pretax Income	$5.710M	$3.920M	$5.380M
YoY Change	69.94%	-3.21%	17.21%
Income Tax	$80.00K	$67.00K	$70.00K
% Of Pretax Income	1.4%	1.71%	1.3%
Net Earnings	$5.060M	$3.310M	$10.38M
YoY Change	-13.06%	-30.46%	74.45%
Net Earnings / Revenue	13.38%	9.61%	30.1%
Basic Earnings Per Share
Diluted Earnings Per Share	$60.92K	$40.56K	$126.2K
COMMON SHARES
Basic Shares Outstanding		81.60M shares
Diluted Shares Outstanding		81.60M shares

Balance Sheet

Concept	2011 Q4	2011 Q3	2011 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$23.80M	$44.00M	$28.90M
YoY Change	-65.1%	113.59%	34.42%
Cash & Equivalents	$23.81M	$44.05M	$28.90M
Short-Term Investments
Other Short-Term Assets	$1.200M	$2.600M	$1.300M
YoY Change	-29.41%	4.0%	-43.48%
Inventory
Prepaid Expenses
Receivables	$170.5M	$89.40M	$87.50M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$195.5M	$136.0M	$117.7M
YoY Change	32.01%	43.76%	37.82%
LONG-TERM ASSETS
Property, Plant & Equipment	$468.0K	$1.089B	$1.058B
YoY Change	-99.95%	19.66%	15.58%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$87.60M	$88.20M	$88.70M
YoY Change	-1.9%	-2.0%	-2.31%
Other Assets	$38.20M	$22.80M	$22.40M
YoY Change	-59.23%	-75.27%	-75.86%
Total Long-Term Assets	$1.213B	$1.210B	$1.186B
YoY Change	11.24%	10.61%	7.76%
TOTAL ASSETS
Total Short-Term Assets	$195.5M	$136.0M	$117.7M
Total Long-Term Assets	$1.213B	$1.210B	$1.186B
Total Assets	$1.409B	$1.346B	$1.304B
YoY Change	13.72%	13.24%	9.92%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$26.40M	$28.30M	$21.40M
YoY Change	17.86%	12.75%	13.83%
Accrued Expenses	$2.200M	$1.400M	$1.100M
YoY Change	22.22%	7.69%	10.0%
Deferred Revenue
YoY Change
Short-Term Debt	$449.0M	$375.0M	$345.0M
YoY Change	57.65%	54.32%	44.96%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$479.6M	$407.2M	$370.0M
YoY Change	54.26%	50.09%	42.42%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$7.600M	$6.700M	$7.400M
YoY Change	22.58%	-1.47%	0.0%
Total Long-Term Liabilities	$7.600M	$6.700M	$7.400M
YoY Change	22.58%	-1.47%	0.0%
TOTAL LIABILITIES
Total Short-Term Liabilities	$479.6M	$407.2M	$370.0M
Total Long-Term Liabilities	$7.600M	$6.700M	$7.400M
Total Liabilities	$487.3M	$413.8M	$377.4M
YoY Change	53.62%	48.8%	41.24%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock	$1.043B
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$921.4M	$932.0M	$926.4M
YoY Change
Total Liabilities & Shareholders Equity	$1.409B	$1.346B	$1.304B
YoY Change	13.72%	13.24%	9.92%

Cashflow Statement

Concept	2011 Q4	2011 Q3	2011 Q2
OPERATING ACTIVITIES
Net Income	$5.060M	$3.310M	$10.38M
YoY Change	-13.06%	-30.46%	74.45%
Depreciation, Depletion And Amortization	$13.70M	$12.90M	$12.60M
YoY Change	30.48%	22.86%	35.48%
Cash From Operating Activities	$17.10M	$18.20M	$15.80M
YoY Change	62.86%	1.11%	3.95%
INVESTING ACTIVITIES
Capital Expenditures	-$22.00M	-$41.30M	-$3.700M
YoY Change	292.86%	1324.14%	-91.25%
Acquisitions
YoY Change
Other Investing Activities	-$73.40M	$6.200M	$42.80M
YoY Change	1690.24%	-182.67%	-2138.1%
Cash From Investing Activities	-$95.40M	-$35.10M	$39.10M
YoY Change	873.47%	240.78%	-188.06%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	58.00M	32.10M	-75.50M
YoY Change	23.4%	-473.26%	-370.61%
NET CHANGE
Cash From Operating Activities	17.10M	18.20M	15.80M
Cash From Investing Activities	-95.40M	-35.10M	39.10M
Cash From Financing Activities	58.00M	32.10M	-75.50M
Net Change In Cash	-20.30M	15.20M	-20.60M
YoY Change	-142.56%	-1788.89%	1484.62%
FREE CASH FLOW
Cash From Operating Activities	$17.10M	$18.20M	$15.80M
Capital Expenditures	-$22.00M	-$41.30M	-$3.700M
Free Cash Flow	$39.10M	$59.50M	$19.50M
YoY Change	142.86%	184.69%	-66.09%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q4	us-gaap	Land Land	132393000	USD
CY2011Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	1006267000	USD
CY2011Q4	us-gaap	Fixtures And Equipment Gross FixturesAndEquipmentGross	831000	USD
CY2011Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	1139491000	USD
CY2011Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	148266000	USD
CY2011Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	991225000	USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	91613000	USD
CY2011Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	87598000	USD
CY2011Q4	us-gaap	Assets Held For Sale At Carrying Value AssetsHeldForSaleAtCarryingValue	15355000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	23813000	USD
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	493000	USD
CY2011Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	1460000	USD
CY2011Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	28502000	USD
CY2011Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	1223000	USD
CY2011Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	140516000	USD
CY2011Q4	us-gaap	Other Assets OtherAssets	4070000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	468000	USD
CY2011Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	22325000	USD
CY2011Q4	us-gaap	Assets Assets	1408661000	USD
CY2011Q4	us-gaap	Line Of Credit LineOfCredit	449000000	USD
CY2011Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	26446000	USD
CY2011Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	2222000	USD
CY2011Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	2008000	USD
CY2011Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	7618000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	487294000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	8000	USD
CY2011Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1042876000	USD
CY2011Q4	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	121517000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	921367000	USD
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-317000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1408661000	USD
CY2011Q4	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2011Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q4	us-gaap	Land Land	144336000	USD
CY2012Q4	us-gaap	Investment Building And Building Improvements InvestmentBuildingAndBuildingImprovements	1178144000	USD
CY2012Q4	us-gaap	Fixtures And Equipment Gross FixturesAndEquipmentGross	904000	USD
CY2012Q4	us-gaap	Real Estate Investment Property Net RealEstateInvestmentPropertyNet	1142628000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	111982000	USD
CY2012Q4	us-gaap	Real Estate Investment Property At Cost RealEstateInvestmentPropertyAtCost	1323384000	USD
CY2012Q4	us-gaap	Real Estate Investment Property Accumulated Depreciation RealEstateInvestmentPropertyAccumulatedDepreciation	180756000	USD
CY2012Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	81960000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	21267000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	575000	USD
CY2012Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	1749000	USD
CY2012Q4	us-gaap	Deferred Rent Receivables Net DeferredRentReceivablesNet	35441000	USD
CY2012Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	1106000	USD
CY2012Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	93896000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	12655000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	544000	USD
CY2012Q4	us-gaap	Deferred Costs Leasing Net DeferredCostsLeasingNet	23376000	USD
CY2012Q4	us-gaap	Assets Assets	1527179000	USD
CY2012Q4	us-gaap	Line Of Credit LineOfCredit	216750000	USD
CY2012Q4	us-gaap	Unsecured Debt UnsecuredDebt	400000000	USD
CY2012Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	31122000	USD
CY2012Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	2540000	USD
CY2012Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	2489000	USD
CY2012Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1219000	USD
CY2012Q4	us-gaap	Off Market Lease Unfavorable OffMarketLeaseUnfavorable	8310000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	662430000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	8000	USD
CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1042876000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1219000	USD
CY2012Q4	us-gaap	Accumulated Distributions In Excess Of Net Income AccumulatedDistributionsInExcessOfNetIncome	176916000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	864749000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1527179000	USD
CY2012Q4	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	31189000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1235000	USD
CY2011Q4	fsp	Allowance For Doubtful Deferred Rent Receivables AllowanceForDoubtfulDeferredRentReceivables	135000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	428000	USD
CY2011Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	9139000	USD
CY2011Q4	fsp	Unfavorable Real Estate Leases Accumulated Amortization UnfavorableRealEstateLeasesAccumulatedAmortization	3759000	USD
CY2011Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2011Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2011Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2011Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	180000000	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	82937405	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	82937405	shares
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	40062000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1300000	USD
CY2012Q4	fsp	Allowance For Doubtful Deferred Rent Receivables AllowanceForDoubtfulDeferredRentReceivables	135000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	584000	USD
CY2012Q4	us-gaap	Deferred Costs Leasing Accumulated Amortization DeferredCostsLeasingAccumulatedAmortization	11812000	USD
CY2012Q4	fsp	Unfavorable Real Estate Leases Accumulated Amortization UnfavorableRealEstateLeasesAccumulatedAmortization	4870000	USD
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.0001
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2010	us-gaap	Depreciation And Amortization DepreciationAndAmortization	35640000	USD
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	180000000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	82937405	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	82937405	shares
CY2011	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	134238000	USD
CY2011	fsp	Management Fees And Interest Income Operating Revenue ManagementFeesAndInterestIncomeOperatingRevenue	4046000	USD
CY2011	us-gaap	Other Real Estate Revenue OtherRealEstateRevenue	49000	USD
CY2011	us-gaap	Revenues Revenues	138333000	USD
CY2011	us-gaap	Cost Of Real Estate Revenue CostOfRealEstateRevenue	35076000	USD
CY2011	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	20114000	USD
CY2011	us-gaap	Depreciation And Amortization DepreciationAndAmortization	47622000	USD
CY2011	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	6913000	USD
CY2011	us-gaap	Interest Expense InterestExpense	12666000	USD
CY2011	us-gaap	Costs And Expenses CostsAndExpenses	122391000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	15942000	USD
CY2011	us-gaap	Investment Income Interest InvestmentIncomeInterest	22000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3685000	USD
CY2011	fsp	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	19649000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	267000	USD
CY2011	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	19382000	USD
CY2011	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	2203000	USD
CY2011	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	21939000	USD
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	24142000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	43524000	USD
CY2012Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	82937000	shares
CY2012Q2	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	82937000	shares
CY2011	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.24
CY2012	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	151656000	USD
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	0.29
CY2011	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.53
CY2010	us-gaap	Real Estate Revenue Net RealEstateRevenueNet	113274000	USD
CY2010	fsp	Management Fees And Interest Income Operating Revenue ManagementFeesAndInterestIncomeOperatingRevenue	2440000	USD
CY2010	us-gaap	Other Real Estate Revenue OtherRealEstateRevenue	88000	USD
CY2010	us-gaap	Revenues Revenues	115802000	USD
CY2010	us-gaap	Cost Of Real Estate Revenue CostOfRealEstateRevenue	32042000	USD
CY2010	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	17782000	USD
CY2010	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	6399000	USD
CY2010	us-gaap	Interest Expense InterestExpense	7284000	USD
CY2010	us-gaap	Costs And Expenses CostsAndExpenses	99147000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	16655000	USD
CY2010	us-gaap	Investment Income Interest InvestmentIncomeInterest	25000	USD
CY2010	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1266000	USD
CY2010	fsp	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	17946000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	217000	USD
CY2010	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	17729000	USD
CY2010	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	4364000	USD
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	4364000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	22093000	USD
CY2012Q3	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	82937000	shares
CY2012Q4	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	82937000	shares
CY2010	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.22
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	0.06
CY2010	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.28
CY2012	fsp	Management Fees And Interest Income Operating Revenue ManagementFeesAndInterestIncomeOperatingRevenue	10947000	USD
CY2012	us-gaap	Other Real Estate Revenue OtherRealEstateRevenue	199000	USD
CY2012	us-gaap	Revenues Revenues	162802000	USD
CY2012	us-gaap	Cost Of Real Estate Revenue CostOfRealEstateRevenue	37441000	USD
CY2012	us-gaap	Real Estate Taxes And Insurance RealEstateTaxesAndInsurance	22913000	USD
CY2012	fsp	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	23676000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	335000	USD
CY2012	us-gaap	Depreciation And Amortization DepreciationAndAmortization	54872000	USD
CY2012	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	9916000	USD
CY2012	us-gaap	Interest Expense InterestExpense	16068000	USD
CY2012	us-gaap	Costs And Expenses CostsAndExpenses	141210000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	21592000	USD
CY2012	us-gaap	Investment Income Interest InvestmentIncomeInterest	51000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2033000	USD
CY2012	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	23341000	USD
CY2012	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Net Of Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax	-882000	USD
CY2012	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	-14826000	USD
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-15708000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7633000	USD
CY2011Q1	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	81437000	shares
CY2011Q2	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	81437000	shares
CY2012	us-gaap	Income Loss From Continuing Operations Per Basic And Diluted Share IncomeLossFromContinuingOperationsPerBasicAndDilutedShare	0.28
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare	-0.19
CY2012	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.09
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-1219000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1219000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	6414000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	94000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	983000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1077000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	44601000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	999000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	999000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	23092000	USD
CY2009Q4	us-gaap	Stockholders Equity StockholdersEquity	937274000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	921558000	USD
CY2010	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	21778000	USD
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	17385000	USD
CY2010	us-gaap	Dividends Common Stock DividendsCommonStock	60586000	USD
CY2011	us-gaap	Dividends Common Stock DividendsCommonStock	62177000	USD
CY2012	us-gaap	Dividends Common Stock DividendsCommonStock	63032000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	57500000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	50261000	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	39627000	USD
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	71000	USD
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	-47000	USD
CY2010	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	1362000	USD
CY2012	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	-14826000	USD
CY2011	us-gaap	Gains Losses On Sales Of Assets GainsLossesOnSalesOfAssets	21939000	USD
CY2012	fsp	Income Loss From Equity Method Investments And Consolidated Investments IncomeLossFromEquityMethodInvestmentsAndConsolidatedInvestments	2033000	USD
CY2011	fsp	Income Loss From Equity Method Investments And Consolidated Investments IncomeLossFromEquityMethodInvestmentsAndConsolidatedInvestments	3086000	USD
CY2010	fsp	Income Loss From Equity Method Investments And Consolidated Investments IncomeLossFromEquityMethodInvestmentsAndConsolidatedInvestments	1183000	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	705000	USD
CY2011	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	3474000	USD
CY2010	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	1633000	USD
CY2012	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	65000	USD
CY2011	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-365000	USD
CY2010	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	980000	USD
CY2012	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	82000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	73000	USD
CY2010	us-gaap	Increase Decrease In Restricted Cash For Operating Activities IncreaseDecreaseInRestrictedCashForOperatingActivities	86000	USD
CY2012	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	354000	USD
CY2011	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-827000	USD
CY2010	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1120000	USD
CY2012	us-gaap	Straight Line Rent StraightLineRent	4464000	USD
CY2011	us-gaap	Straight Line Rent StraightLineRent	9878000	USD
CY2010	us-gaap	Straight Line Rent StraightLineRent	4249000	USD
CY2012	fsp	Increase Decrease In Operating Lease Acquisition Costs IncreaseDecreaseInOperatingLeaseAcquisitionCosts	2520000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	328000	USD
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1611000	USD
CY2010	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-865000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	3717000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	4213000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-351000	USD
CY2012	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	318000	USD
CY2011	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	419000	USD
CY2010	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	387000	USD
CY2012	us-gaap	Increase Decrease In Security Deposits IncreaseDecreaseInSecurityDeposits	481000	USD
CY2011	us-gaap	Increase Decrease In Security Deposits IncreaseDecreaseInSecurityDeposits	78000	USD
CY2010	us-gaap	Increase Decrease In Security Deposits IncreaseDecreaseInSecurityDeposits	122000	USD
CY2012	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	5179000	USD
CY2011	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	8058000	USD
CY2010	us-gaap	Increase Decrease In Deferred Leasing Fees IncreaseDecreaseInDeferredLeasingFees	10515000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	70356000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	60961000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	49565000	USD
CY2012	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	183868000	USD
CY2011	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	174020000	USD
CY2010	us-gaap	Payments To Acquire Real Estate PaymentsToAcquireRealEstate	38781000	USD
CY2012	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	37302000	USD
CY2011	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	62230000	USD
CY2010	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	15563000	USD
CY2012	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	1000	USD
CY2011	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	10000	USD
CY2010	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	11000	USD
CY2012	fsp	Equity Method Investment Distribution In Excess Of Earnings EquityMethodInvestmentDistributionInExcessOfEarnings	2105000	USD
CY2011	fsp	Equity Method Investment Distribution In Excess Of Earnings EquityMethodInvestmentDistributionInExcessOfEarnings	1582000	USD
CY2010	fsp	Equity Method Investment Distribution In Excess Of Earnings EquityMethodInvestmentDistributionInExcessOfEarnings	3537000	USD
CY2012	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	74580000	USD
CY2011	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	82832000	USD
CY2010	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	21149000	USD
CY2012	us-gaap	Repayment Of Notes Receivable From Related Parties RepaymentOfNotesReceivableFromRelatedParties	121200000	USD
CY2011	us-gaap	Payments For Proceeds From Deposits On Real Estate Acquisitions PaymentsForProceedsFromDepositsOnRealEstateAcquisitions	-200000	USD
CY2010	us-gaap	Payments For Proceeds From Deposits On Real Estate Acquisitions PaymentsForProceedsFromDepositsOnRealEstateAcquisitions	200000	USD
CY2011	us-gaap	Proceeds From Payments For Long Term Loans For Related Parties ProceedsFromPaymentsForLongTermLoansForRelatedParties	2230000	USD
CY2010	us-gaap	Proceeds From Payments For Long Term Loans For Related Parties ProceedsFromPaymentsForLongTermLoansForRelatedParties	1319000	USD
CY2012	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	157000	USD
CY2011	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	96790000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-172289000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-218290000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-70848000	USD
CY2012	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	63032000	USD
CY2011	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	62177000	USD
CY2010	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	60586000	USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	18001000	USD
CY2010	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	22701000	USD
CY2011	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	706000	USD
CY2010	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	833000	USD
CY2012	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	294750000	USD
CY2011	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	449000000	USD
CY2010	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	100960000	USD
CY2012	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	527000000	USD
CY2011	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	209968000	USD
CY2012	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	400000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	-74850000	USD
CY2010	us-gaap	Proceeds From Issuance Of Unsecured Debt ProceedsFromIssuanceOfUnsecuredDebt	-150000	USD
CY2012	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	5331000	USD
CY2011	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	5388000	USD
CY2011	us-gaap	Payments For Hedge Financing Activities PaymentsForHedgeFinancingActivities	983000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	99387000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	112929000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	62092000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-2546000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-44400000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	40809000	USD
CY2012	us-gaap	Interest Paid InterestPaid	13969000	USD
CY2011	us-gaap	Interest Paid InterestPaid	9688000	USD
CY2010	us-gaap	Interest Paid InterestPaid	6931000	USD
CY2011	us-gaap	Income Taxes Paid IncomeTaxesPaid	225000	USD
CY2010	us-gaap	Income Taxes Paid IncomeTaxesPaid	245000	USD
CY2011	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	733000	USD
CY2010	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	845000	USD
CY2012	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1692000	USD
CY2010Q4	fsp	Accrued Stock Issuance Costs AccruedStockIssuanceCosts	90000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	68213000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	27404000	USD
CY2012	us-gaap	Nature Of Operations NatureOfOperations	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="MARGIN: 0in 0in 0pt"><b><font style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">1.     Organization</font></b></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">Franklin Street Properties Corp. (“FSP Corp.” or the “Company”), holds, directly and indirectly, 100% of the interest in FSP Investments LLC, FSP Property Management LLC, FSP Holdings LLC and FSP Protective TRS Corp.  FSP Investments LLC is a registered broker/dealer with the Securities and Exchange Commission and is a member of the Financial Industry Regulatory Authority, or FINRA.  FSP Property Management LLC provides asset management and property management services.  The Company also has a non-controlling common stock interest in 15 corporations organized to operate as real estate investment trusts (“REIT”) and a non-controlling preferred stock interest in two of those REITs.  Collectively, the 15 REITs are referred to as the “Sponsored REITs”.</font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">As of December 31, 2012, the Company owned and operated a portfolio of real estate consisting of 37 properties, managed 15 Sponsored REITs and held seven promissory notes secured by mortgages on real estate owned by Sponsored REITs, including one mortgage loan, one construction loan and five revolving lines of credit.  From time-to-time, the Company may acquire real estate, make additional secured loans or acquire a Sponsored REIT.  The Company may also pursue, on a selective basis, the sale of its properties in order to take advantage of the value creation and demand for its properties, or for geographic or property specific reasons.</font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">Previously the Company, through FSP Investments LLC, structured real estate investments and offered broker/dealer services that included the organization of Sponsored REITs, the acquisition and development of real estate on behalf of Sponsored REITs and the raising of capital to equitize the Sponsored REITs through sale of preferred stock in private placements.  On December 15, 2011, the Company announced that it would no longer sponsor the syndication of shares of preferred stock in newly-formed Sponsored REITs.</font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p></div>
CY2012Q4	fsp	Number Of Rei Ts In Which Entity Holds Noncontrolling Common Stock Interest NumberOfREITsInWhichEntityHoldsNoncontrollingCommonStockInterest	15	entity
CY2012Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	37	property
CY2012Q4	fsp	Number Of Rei Ts In Which Entity Holds Noncontrolling Preferred Stock Interest NumberOfREITsInWhichEntityHoldsNoncontrollingPreferredStockInterest	2	entity
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="MARGIN: 0in 0in 0pt"><i><font style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman" size="2">Estimates and Assumptions</font></i></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">The Company prepares its financial statements and related notes in conformity with accounting principles generally accepted in the United States of America (“GAAP”).  These principles require management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period.  Actual results could differ from those estimates.  Significant estimates in the consolidated financial statements include the allowance for doubtful accounts, purchase price allocations, useful lives of fixed assets and the valuation of the derivative.</font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p></div>
CY2012	fsp	Number Of Direct Acquisitions Of Properties With Leases NumberOfDirectAcquisitionsOfPropertiesWithLeases	2	item
CY2011	fsp	Number Of Direct Acquisitions Of Properties With Leases NumberOfDirectAcquisitionsOfPropertiesWithLeases	5	item
CY2010	fsp	Number Of Direct Acquisitions Of Properties With Leases NumberOfDirectAcquisitionsOfPropertiesWithLeases	1	item
CY2012	fsp	Disposal Group Including Discontinued Operation Maximum Period For Disposal DisposalGroupIncludingDiscontinuedOperationMaximumPeriodForDisposal	P1Y
CY2012	fsp	Maximum Term Of Original Maturity To Classify Instruments As Cash Equivalents MaximumTermOfOriginalMaturityToClassifyInstrumentsAsCashEquivalents	P3M
CY2012	fsp	Tenant Rent Receivables Collection Period Maximum TenantRentReceivablesCollectionPeriodMaximum	P1Y
CY2010	us-gaap	Amortization Of Deferred Leasing Fees AmortizationOfDeferredLeasingFees	2867000	USD
CY2011	us-gaap	Amortization Of Deferred Leasing Fees AmortizationOfDeferredLeasingFees	3806000	USD
CY2012	us-gaap	Amortization Of Deferred Leasing Fees AmortizationOfDeferredLeasingFees	4173000	USD
CY2012	fsp	Deferred Leasing Commissions Future Amortization Expense Year One DeferredLeasingCommissionsFutureAmortizationExpenseYearOne	4080000	USD
CY2012	fsp	Deferred Leasing Commissions Future Amortization Expense Year Two DeferredLeasingCommissionsFutureAmortizationExpenseYearTwo	3967000	USD
CY2012	fsp	Deferred Leasing Commissions Future Amortization Expense Year Three DeferredLeasingCommissionsFutureAmortizationExpenseYearThree	3571000	USD
CY2012	fsp	Deferred Leasing Commissions Future Amortization Expense Year Four DeferredLeasingCommissionsFutureAmortizationExpenseYearFour	3171000	USD
CY2012	fsp	Deferred Leasing Commissions Future Amortization Expense Year Five DeferredLeasingCommissionsFutureAmortizationExpenseYearFive	2286000	USD
CY2012	fsp	Deferred Leasing Commissions Future Amortization Expense After Year Five DeferredLeasingCommissionsFutureAmortizationExpenseAfterYearFive	6301000	USD
CY2010	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	86320000	USD
CY2011	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	98308000	USD
CY2012	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	117462000	USD
CY2010	us-gaap	Tenant Reimbursements TenantReimbursements	24505000	USD
CY2010	fsp	Amortization Of Finite Lived Identifiable Intangible Asset Liability Net AmortizationOfFiniteLivedIdentifiableIntangibleAssetLiabilityNet	1491000	USD
CY2011	us-gaap	Tenant Reimbursements TenantReimbursements	26006000	USD
CY2012	us-gaap	Tenant Reimbursements TenantReimbursements	29847000	USD
CY2010	fsp	Deferred Rent Receivable Adjustment DeferredRentReceivableAdjustment	3940000	USD
CY2011	fsp	Deferred Rent Receivable Adjustment DeferredRentReceivableAdjustment	9877000	USD
CY2012	fsp	Deferred Rent Receivable Adjustment DeferredRentReceivableAdjustment	4418000	USD
CY2011	fsp	Amortization Of Finite Lived Identifiable Intangible Asset Liability Net AmortizationOfFiniteLivedIdentifiableIntangibleAssetLiabilityNet	-47000	USD
CY2012	fsp	Amortization Of Finite Lived Identifiable Intangible Asset Liability Net AmortizationOfFiniteLivedIdentifiableIntangibleAssetLiabilityNet	71000	USD
CY2012	fsp	Reporting Segment Number ReportingSegmentNumber	1	item
CY2010	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	79826000	shares
CY2012	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	82937000	shares
CY2011	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	81857000	shares
CY2012	fsp	Number Of Banks In Which Entity Maintains Cash Balances NumberOfBanksInWhichEntityMaintainsCashBalances	2	item
CY2012Q4	us-gaap	Cash Fdic Insured Amount CashFDICInsuredAmount	250000	USD
CY2012	fsp	Square Footage Of Real Estate Property Acquired SquareFootageOfRealEstatePropertyAcquired	629000
CY2012	fsp	Real Estate Aggregate Purchase Price RealEstateAggregatePurchasePrice	154800000	USD
CY2012	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	156000	USD
CY2012Q4	fsp	Business Acquisition Purchase Price Allocation Real Estate Assets Acquired BusinessAcquisitionPurchasePriceAllocationRealEstateAssetsAcquired	130000000	USD
CY2012Q4	fsp	Business Acquisition Purchase Price Allocation Real Estate Lease Acquired BusinessAcquisitionPurchasePriceAllocationRealEstateLeaseAcquired	24947000	USD
CY2012Q4	fsp	Business Acquisition Purchase Price Allocation Unfavorable Leases Acquired BusinessAcquisitionPurchasePriceAllocationUnfavorableLeasesAcquired	2022000	USD
CY2012Q4	us-gaap	Business Acquisition Purchase Price Allocation Assets Acquired BusinessAcquisitionPurchasePriceAllocationAssetsAcquired	152925000	USD
CY2011	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	155313000	USD
CY2012	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	176684000	USD
CY2012	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	20446000	USD
CY2011	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	15776000	USD
CY2012	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	4738000	USD
CY2011	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	41320000	USD
CY2012	us-gaap	Weighted Average Basic Shares Outstanding Pro Forma WeightedAverageBasicSharesOutstandingProForma	82937000	shares
CY2011	us-gaap	Weighted Average Basic Shares Outstanding Pro Forma WeightedAverageBasicSharesOutstandingProForma	81857000	shares
CY2012	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	0.25
CY2011	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	0.19
CY2012	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.06
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.50
CY2012	us-gaap	Business Combination Pro Forma Information Revenue Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual	3000000	USD
CY2012	us-gaap	Business Combination Pro Forma Information Earnings Or Loss Of Acquiree Since Acquisition Date Actual BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual	2000000	USD
CY2012Q4	fsp	Number Of Sponsored Rei Ts Fully Syndicated NumberOfSponsoredREITsFullySyndicated	15	entity
CY2011Q4	fsp	Number Of Sponsored Rei Ts Fully Syndicated NumberOfSponsoredREITsFullySyndicated	16	entity
CY2010Q4	fsp	Number Of Sponsored Rei Ts NumberOfSponsoredREITs	15	entity
CY2010Q4	fsp	Number Of Sponsored Rei Ts Fully Syndicated NumberOfSponsoredREITsFullySyndicated	14	entity
CY2010Q4	fsp	Number Of Sponsored Rei Ts Not Fully Syndicated NumberOfSponsoredREITsNotFullySyndicated	1	entity
CY2012	fsp	Equity Method Investment Dividends Or Distribution In Excess Of Earnings EquityMethodInvestmentDividendsOrDistributionInExcessOfEarnings	2810000	USD
CY2011	fsp	Equity Method Investment Dividends Or Distribution In Excess Of Earnings EquityMethodInvestmentDividendsOrDistributionInExcessOfEarnings	5056000	USD
CY2010	fsp	Equity Method Investment Dividends Or Distribution In Excess Of Earnings EquityMethodInvestmentDividendsOrDistributionInExcessOfEarnings	5170000	USD
CY2012Q4	fsp	Number Of Sponsored Rei Ts NumberOfSponsoredREITs	15	entity
CY2011Q4	fsp	Number Of Sponsored Rei Ts NumberOfSponsoredREITs	16	entity
CY2012Q4	fsp	Equity Method Investment Summarized Financial Information Real Estate Net EquityMethodInvestmentSummarizedFinancialInformationRealEstateNet	659655000	USD
CY2011Q4	fsp	Equity Method Investment Summarized Financial Information Real Estate Net EquityMethodInvestmentSummarizedFinancialInformationRealEstateNet	755825000	USD
CY2012Q4	fsp	Equity Method Investment Summarized Financial Information Other Assets EquityMethodInvestmentSummarizedFinancialInformationOtherAssets	156785000	USD
CY2011Q4	fsp	Equity Method Investment Summarized Financial Information Other Assets EquityMethodInvestmentSummarizedFinancialInformationOtherAssets	135658000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities EquityMethodInvestmentSummarizedFinancialInformationLiabilities	316311000	USD
CY2011Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities EquityMethodInvestmentSummarizedFinancialInformationLiabilities	293326000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity EquityMethodInvestmentSummarizedFinancialInformationEquity	500129000	USD
CY2011Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity EquityMethodInvestmentSummarizedFinancialInformationEquity	598157000	USD
CY2012	fsp	Equity Method Investment Summarized Financial Information Rental Revenue EquityMethodInvestmentSummarizedFinancialInformationRentalRevenue	109676000	USD
CY2011	fsp	Equity Method Investment Summarized Financial Information Rental Revenue EquityMethodInvestmentSummarizedFinancialInformationRentalRevenue	111417000	USD
CY2010	fsp	Equity Method Investment Summarized Financial Information Rental Revenue EquityMethodInvestmentSummarizedFinancialInformationRentalRevenue	91406000	USD
CY2012	fsp	Equity Method Investment Summarized Financial Information Other Revenue EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue	115000	USD
CY2011	fsp	Equity Method Investment Summarized Financial Information Other Revenue EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue	90000	USD
CY2010	fsp	Equity Method Investment Summarized Financial Information Other Revenue EquityMethodInvestmentSummarizedFinancialInformationOtherRevenue	162000	USD
CY2012	fsp	Equity Method Investment Summarized Financial Information Operating And Maintenance Expense EquityMethodInvestmentSummarizedFinancialInformationOperatingAndMaintenanceExpense	56621000	USD
CY2011	fsp	Equity Method Investment Summarized Financial Information Operating And Maintenance Expense EquityMethodInvestmentSummarizedFinancialInformationOperatingAndMaintenanceExpense	55672000	USD
CY2010	fsp	Equity Method Investment Summarized Financial Information Operating And Maintenance Expense EquityMethodInvestmentSummarizedFinancialInformationOperatingAndMaintenanceExpense	50339000	USD
CY2011	fsp	Equity Method Investment Summarized Financial Information Selling General And Administrative Expense EquityMethodInvestmentSummarizedFinancialInformationSellingGeneralAndAdministrativeExpense	604000	USD
CY2009Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	1020787000	USD
CY2012	fsp	Equity Method Investment Summarized Financial Information Depreciation And Amortization EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization	35143000	USD
CY2011	fsp	Equity Method Investment Summarized Financial Information Depreciation And Amortization EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization	33909000	USD
CY2010	fsp	Equity Method Investment Summarized Financial Information Depreciation And Amortization EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization	27138000	USD
CY2012	fsp	Equity Method Investment Summarized Financial Information Interest Expense EquityMethodInvestmentSummarizedFinancialInformationInterestExpense	17357000	USD
CY2011	fsp	Equity Method Investment Summarized Financial Information Interest Expense EquityMethodInvestmentSummarizedFinancialInformationInterestExpense	17180000	USD
CY2010	fsp	Equity Method Investment Summarized Financial Information Interest Expense EquityMethodInvestmentSummarizedFinancialInformationInterestExpense	11160000	USD
CY2012	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	37280000	USD
CY2011	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	4142000	USD
CY2010	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	2931000	USD
CY2012	fsp	Asset Management Fees Percentage Low End Of Range AssetManagementFeesPercentageLowEndOfRange	0.01	pure
CY2012	fsp	Asset Management Fees Percentage High End Of Range AssetManagementFeesPercentageHighEndOfRange	0.05	pure
CY2012	fsp	Notice Period For Cancellation Of Asset Management Fee Contract NoticePeriodForCancellationOfAssetManagementFeeContract	P30D
CY2012	us-gaap	Asset Management Fees AssetManagementFees	1149000	USD
CY2011	us-gaap	Asset Management Fees AssetManagementFees	958000	USD
CY2010	us-gaap	Asset Management Fees AssetManagementFees	830000	USD
CY2012	us-gaap	Income Taxes Paid IncomeTaxesPaid	265000	USD
CY2012	us-gaap	Interest And Fee Income Loans Commercial InterestAndFeeIncomeLoansCommercial	9798000	USD
CY2011	us-gaap	Interest And Fee Income Loans Commercial InterestAndFeeIncomeLoansCommercial	3087000	USD
CY2010	us-gaap	Interest And Fee Income Loans Commercial InterestAndFeeIncomeLoansCommercial	1609000	USD
CY2012Q4	fsp	Loans And Leases Receivable Related Parties Maximum Amount Of Loan LoansAndLeasesReceivableRelatedPartiesMaximumAmountOfLoan	118800000	USD
CY2012	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0223	pure
CY2011	us-gaap	Line Of Credit Facility Interest Rate During Period LineOfCreditFacilityInterestRateDuringPeriod	0.0195	pure
CY2012	fsp	Common Stock Dividends Per Share Cash Paid Ordinary Taxable Distribution Percentage CommonStockDividendsPerShareCashPaidOrdinaryTaxableDistributionPercentage	0.4061	pure
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2000000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1944428	shares
CY2012	fsp	Maximum Ownership Percentage In Each Issuer Other Than Reit Or Trs To Maintain Reit Status MaximumOwnershipPercentageInEachIssuerOtherThanREITOrTRSToMaintainREITStatus	0.10	pure
CY2012	fsp	Maximum Ownership In All Taxable Reit Subsidiaries As Percentage Of Assets Of Entity To Maintain Reit Status MaximumOwnershipInAllTaxableREITSubsidiariesAsPercentageOfAssetsOfEntityToMaintainREITStatus	0.25	pure
CY2012	fsp	Maximum Ownership In All Taxable Reit Subsidiaries As Percentage Of Assets Of Entity To Maintain Reit Status Including Other Non Real Estate Assets MaximumOwnershipInAllTaxableREITSubsidiariesAsPercentageOfAssetsOfEntityToMaintainREITStatusIncludingOtherNonRealEstateAssets	0.25	pure
CY2012	fsp	Period Of Statute Of Limitations PeriodOfStatuteOfLimitations	P3Y
CY2012	fsp	Operating Loss Carryforwards Expiration Period OperatingLossCarryforwardsExpirationPeriod	P20Y
CY2012Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	13041000	USD
CY2011Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	13041000	USD
CY2010Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	13041000	USD
CY2012	fsp	Effective Revised Texas Franchise Tax Rate EffectiveRevisedTexasFranchiseTaxRate	0.007	pure
CY2012	fsp	Income Tax Reconciliation Revised Texas Franchise Tax IncomeTaxReconciliationRevisedTexasFranchiseTax	330000	USD
CY2011	fsp	Income Tax Reconciliation Revised Texas Franchise Tax IncomeTaxReconciliationRevisedTexasFranchiseTax	253000	USD
CY2010	fsp	Income Tax Reconciliation Revised Texas Franchise Tax IncomeTaxReconciliationRevisedTexasFranchiseTax	217000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	5000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	14000	USD
CY2012Q4	fsp	Real Estate Assets Differences Between Book And Tax Basis RealEstateAssetsDifferencesBetweenBookAndTaxBasis	61255000	USD
CY2011Q4	fsp	Real Estate Assets Differences Between Book And Tax Basis RealEstateAssetsDifferencesBetweenBookAndTaxBasis	20215000	USD
CY2012	fsp	Reconciliation Of Income From Book Basis To Tax Basis Depreciation And Amortization Book Basis ReconciliationOfIncomeFromBookBasisToTaxBasisDepreciationAndAmortizationBookBasis	55518000	USD
CY2011	fsp	Reconciliation Of Income From Book Basis To Tax Basis Depreciation And Amortization Book Basis ReconciliationOfIncomeFromBookBasisToTaxBasisDepreciationAndAmortizationBookBasis	48439000	USD
CY2010	fsp	Reconciliation Of Income From Book Basis To Tax Basis Depreciation And Amortization Book Basis ReconciliationOfIncomeFromBookBasisToTaxBasisDepreciationAndAmortizationBookBasis	40724000	USD
CY2012	fsp	Reconciliation Of Income From Book Basis To Tax Basis Depreciation And Amortization Tax Basis ReconciliationOfIncomeFromBookBasisToTaxBasisDepreciationAndAmortizationTaxBasis	34047000	USD
CY2011	fsp	Reconciliation Of Income From Book Basis To Tax Basis Depreciation And Amortization Tax Basis ReconciliationOfIncomeFromBookBasisToTaxBasisDepreciationAndAmortizationTaxBasis	31409000	USD
CY2010	fsp	Reconciliation Of Income From Book Basis To Tax Basis Depreciation And Amortization Tax Basis ReconciliationOfIncomeFromBookBasisToTaxBasisDepreciationAndAmortizationTaxBasis	26901000	USD
CY2012	fsp	Reconciliation Of Income From Book Basis To Tax Basis On Assets Sold ReconciliationOfIncomeFromBookBasisToTaxBasisOnAssetsSold	-265000	USD
CY2011	fsp	Reconciliation Of Income From Book Basis To Tax Basis On Assets Sold ReconciliationOfIncomeFromBookBasisToTaxBasisOnAssetsSold	1281000	USD
CY2012	fsp	Reconciliation Of Income From Book Basis To Tax Basis Net Rent Adjustment ReconciliationOfIncomeFromBookBasisToTaxBasisNetRentAdjustment	-5203000	USD
CY2011	fsp	Reconciliation Of Income From Book Basis To Tax Basis Net Rent Adjustment ReconciliationOfIncomeFromBookBasisToTaxBasisNetRentAdjustment	-9783000	USD
CY2010	fsp	Reconciliation Of Income From Book Basis To Tax Basis Net Rent Adjustment ReconciliationOfIncomeFromBookBasisToTaxBasisNetRentAdjustment	-4252000	USD
CY2012	fsp	Reconciliation Of Income From Book Basis To Tax Basis Rental Income Deferred Net ReconciliationOfIncomeFromBookBasisToTaxBasisRentalIncomeDeferredNet	1224000	USD
CY2011	fsp	Reconciliation Of Income From Book Basis To Tax Basis Rental Income Deferred Net ReconciliationOfIncomeFromBookBasisToTaxBasisRentalIncomeDeferredNet	1290000	USD
CY2010	fsp	Reconciliation Of Income From Book Basis To Tax Basis Rental Income Deferred Net ReconciliationOfIncomeFromBookBasisToTaxBasisRentalIncomeDeferredNet	275000	USD
CY2012	fsp	Reconciliation Of Income From Book Basis To Tax Basis Dividends Common Stock Non Taxable ReconciliationOfIncomeFromBookBasisToTaxBasisDividendsCommonStockNonTaxable	1114000	USD
CY2011	fsp	Reconciliation Of Income From Book Basis To Tax Basis Dividends Common Stock Non Taxable ReconciliationOfIncomeFromBookBasisToTaxBasisDividendsCommonStockNonTaxable	767000	USD
CY2010	fsp	Reconciliation Of Income From Book Basis To Tax Basis Dividends Common Stock Non Taxable ReconciliationOfIncomeFromBookBasisToTaxBasisDividendsCommonStockNonTaxable	2026000	USD
CY2012	fsp	Reconciliation Of Income From Book Basis To Tax Basis Other ReconciliationOfIncomeFromBookBasisToTaxBasisOther	1899000	USD
CY2011	fsp	Reconciliation Of Income From Book Basis To Tax Basis Other ReconciliationOfIncomeFromBookBasisToTaxBasisOther	2728000	USD
CY2010	fsp	Reconciliation Of Income From Book Basis To Tax Basis Other ReconciliationOfIncomeFromBookBasisToTaxBasisOther	6355000	USD
CY2012	fsp	Reconciliation Of Income From Book Basis To Tax Basis Profit Loss Tax Basis ReconciliationOfIncomeFromBookBasisToTaxBasisProfitLossTaxBasis	26175000	USD
CY2011	fsp	Reconciliation Of Income From Book Basis To Tax Basis Profit Loss Tax Basis ReconciliationOfIncomeFromBookBasisToTaxBasisProfitLossTaxBasis	52741000	USD
CY2010	fsp	Reconciliation Of Income From Book Basis To Tax Basis Profit Loss Tax Basis ReconciliationOfIncomeFromBookBasisToTaxBasisProfitLossTaxBasis	36268000	USD
CY2012	fsp	Capital Gains Recognized CapitalGainsRecognized	1514000	USD
CY2011	fsp	Capital Gains Recognized CapitalGainsRecognized	21951000	USD
CY2010	fsp	Capital Gains Recognized CapitalGainsRecognized	293000	USD
CY2012	fsp	Net Taxable Income Loss Subject To Distribution Requirement NetTaxableIncomeLossSubjectToDistributionRequirement	24661000	USD
CY2011	fsp	Net Taxable Income Loss Subject To Distribution Requirement NetTaxableIncomeLossSubjectToDistributionRequirement	30790000	USD
CY2010	fsp	Net Taxable Income Loss Subject To Distribution Requirement NetTaxableIncomeLossSubjectToDistributionRequirement	35975000	USD
CY2012	fsp	Common Stock Dividends Per Share Cash Paid Ordinary Taxable Distribution CommonStockDividendsPerShareCashPaidOrdinaryTaxableDistribution	0.31
CY2011	fsp	Common Stock Dividends Per Share Cash Paid Ordinary Taxable Distribution CommonStockDividendsPerShareCashPaidOrdinaryTaxableDistribution	0.38
CY2010	fsp	Common Stock Dividends Per Share Cash Paid Ordinary Taxable Distribution CommonStockDividendsPerShareCashPaidOrdinaryTaxableDistribution	0.46
CY2012	fsp	Common Stock Dividends Per Share Cash Paid Long Term Capital Gain CommonStockDividendsPerShareCashPaidLongTermCapitalGain	0.02
CY2011	fsp	Common Stock Dividends Per Share Cash Paid Long Term Capital Gain CommonStockDividendsPerShareCashPaidLongTermCapitalGain	0.27
CY2012	fsp	Common Stock Dividends Per Share Cash Paid Return Of Capital CommonStockDividendsPerShareCashPaidReturnOfCapital	0.43
CY2011	fsp	Common Stock Dividends Per Share Cash Paid Return Of Capital CommonStockDividendsPerShareCashPaidReturnOfCapital	0.11
CY2010	fsp	Common Stock Dividends Per Share Cash Paid Return Of Capital CommonStockDividendsPerShareCashPaidReturnOfCapital	0.30
CY2012	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.76
CY2011	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.76
CY2010	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.76
CY2010	fsp	Common Stock Dividends Per Share Cash Paid Ordinary Taxable Distribution Percentage CommonStockDividendsPerShareCashPaidOrdinaryTaxableDistributionPercentage	0.6036	pure
CY2012	fsp	Common Stock Dividends Per Share Cash Paid Long Term Capital Gain Percentage CommonStockDividendsPerShareCashPaidLongTermCapitalGainPercentage	0.0240	pure
CY2011	fsp	Common Stock Dividends Per Share Cash Paid Long Term Capital Gain Percentage CommonStockDividendsPerShareCashPaidLongTermCapitalGainPercentage	0.3517	pure
CY2010	fsp	Common Stock Dividends Per Share Cash Paid Long Term Capital Gain Percentage CommonStockDividendsPerShareCashPaidLongTermCapitalGainPercentage	0.0048	pure
CY2012	fsp	Common Stock Dividends Per Share Cash Paid Return Of Capital Percentage CommonStockDividendsPerShareCashPaidReturnOfCapitalPercentage	0.5699	pure
CY2011	fsp	Common Stock Dividends Per Share Cash Paid Return Of Capital Percentage CommonStockDividendsPerShareCashPaidReturnOfCapitalPercentage	0.1404	pure
CY2011	fsp	Common Stock Dividends Per Share Cash Paid Ordinary Taxable Distribution Percentage CommonStockDividendsPerShareCashPaidOrdinaryTaxableDistributionPercentage	0.5079	pure
CY2010	fsp	Common Stock Dividends Per Share Cash Paid Return Of Capital Percentage CommonStockDividendsPerShareCashPaidReturnOfCapitalPercentage	0.3916	pure
CY2012	fsp	Common Stock Dividends Per Share Cash Paid Aggregate Percentage CommonStockDividendsPerShareCashPaidAggregatePercentage	1.00	pure
CY2011	fsp	Common Stock Dividends Per Share Cash Paid Aggregate Percentage CommonStockDividendsPerShareCashPaidAggregatePercentage	1.00	pure
CY2010	fsp	Common Stock Dividends Per Share Cash Paid Aggregate Percentage CommonStockDividendsPerShareCashPaidAggregatePercentage	1.00	pure
CY2012	fsp	Capital Gains As Percentage Of Common Stock Dividends Per Share Cash Paid CapitalGainsAsPercentageOfCommonStockDividendsPerShareCashPaid	0.024	pure
CY2011	fsp	Capital Gains As Percentage Of Common Stock Dividends Per Share Cash Paid CapitalGainsAsPercentageOfCommonStockDividendsPerShareCashPaid	0.2978	pure
CY2010	fsp	Capital Gains As Percentage Of Common Stock Dividends Per Share Cash Paid CapitalGainsAsPercentageOfCommonStockDividendsPerShareCashPaid	0.0048	pure
CY2012	fsp	Effective Income Tax Rate On Capital Gains EffectiveIncomeTaxRateOnCapitalGains	0.15	pure
CY2011	fsp	Effective Income Tax Rate On Capital Gains EffectiveIncomeTaxRateOnCapitalGains	0.15	pure
CY2010	fsp	Effective Income Tax Rate On Capital Gains EffectiveIncomeTaxRateOnCapitalGains	0.15	pure
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	403000	USD
CY2011	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	400000	USD
CY2010	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	366000	USD
CY2012	fsp	Defined Contribution Plan Maximum Employee Compensation To Be Deferred Per Annum DefinedContributionPlanMaximumEmployeeCompensationToBeDeferredPerAnnum	17000	USD
CY2012	fsp	Defined Contribution Plan Employer Maximum Matching Contribution Percentage Of Salary DefinedContributionPlanEmployerMaximumMatchingContributionPercentageOfSalary	0.03	pure
CY2011	fsp	Defined Contribution Plan Employer Maximum Matching Contribution Percentage Of Salary DefinedContributionPlanEmployerMaximumMatchingContributionPercentageOfSalary	0.03	pure
CY2010	fsp	Defined Contribution Plan Employer Maximum Matching Contribution Percentage Of Salary DefinedContributionPlanEmployerMaximumMatchingContributionPercentageOfSalary	0.03	pure
CY2012	fsp	Defined Contribution Plan Employer Maximum Matching Contribution DefinedContributionPlanEmployerMaximumMatchingContribution	200000	USD
CY2011	fsp	Defined Contribution Plan Employer Maximum Matching Contribution DefinedContributionPlanEmployerMaximumMatchingContribution	200000	USD
CY2010	fsp	Defined Contribution Plan Employer Maximum Matching Contribution DefinedContributionPlanEmployerMaximumMatchingContribution	200000	USD
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	109000	USD
CY2011	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	131000	USD
CY2010	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	125000	USD
CY2012Q1	us-gaap	Revenues Revenues	38953000	USD
CY2012Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	6055000	USD
CY2010	fsp	Real Estate Accumulated Depreciation Reduction Due To Assets Held For Sale RealEstateAccumulatedDepreciationReductionDueToAssetsHeldForSale	6604000	USD
CY2011Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3314000	USD
CY2011Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	24767000	USD
CY2012Q2	us-gaap	Revenues Revenues	38654000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	5701000	USD
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-268000	USD
CY2011Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	10381000	USD
CY2012Q3	us-gaap	Revenues Revenues	41775000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	5573000	USD
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-14571000	USD
CY2012Q4	us-gaap	Revenues Revenues	43420000	USD
CY2012Q4	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	6012000	USD
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-552000	USD
CY2011Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5062000	USD
CY2011Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.30
CY2011Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.13
CY2011Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.04
CY2011Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.06
CY2011Q3	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	81600000	shares
CY2011Q4	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	82937000	shares
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	19919000	USD
CY2011Q1	us-gaap	Revenues Revenues	31581000	USD
CY2011Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	4848000	USD
CY2011Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	5359000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5738000	USD
CY2012Q1	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.07
CY2011Q2	us-gaap	Revenues Revenues	34486000	USD
CY2011Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	5022000	USD
CY2011Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-542000	USD
CY2012Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5433000	USD
CY2011Q3	us-gaap	Revenues Revenues	34443000	USD
CY2011Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	3856000	USD
CY2011Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-594000	USD
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-8998000	USD
CY2011Q4	us-gaap	Revenues Revenues	37823000	USD
CY2011Q4	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	5656000	USD
CY2012Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5460000	USD
CY2012Q2	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.07
CY2012Q3	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.11
CY2012Q4	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	0.07
CY2009Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	98954000	USD
CY2011	fsp	Reduction Of Real Estate Gross At Carrying Value Due To Assets Held For Sale ReductionOfRealEstateGrossAtCarryingValueDueToAssetsHeldForSale	19317000	USD
CY2011	fsp	Real Estate Accumulated Depreciation Reduction Due To Assets Held For Sale RealEstateAccumulatedDepreciationReductionDueToAssetsHeldForSale	4321000	USD
CY2012Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	1323384000	USD
CY2011Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	1158808000	USD
CY2010Q4	us-gaap	Real Estate Gross At Carrying Value RealEstateGrossAtCarryingValue	1053678000	USD
CY2011	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	151897000	USD
CY2010	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	23842000	USD
CY2011	us-gaap	Real Estate Improvements RealEstateImprovements	21296000	USD
CY2010	us-gaap	Real Estate Improvements RealEstateImprovements	9049000	USD
CY2010	fsp	Reduction Of Real Estate Gross At Carrying Value Due To Assets Held For Sale ReductionOfRealEstateGrossAtCarryingValueDueToAssetsHeldForSale	86501000	USD
CY2011	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	68063000	USD
CY2012Q4	us-gaap	Real Estate Investments RealEstateInvestments	1323384000	USD
CY2011Q4	us-gaap	Real Estate Investments RealEstateInvestments	1139491000	USD
CY2010Q4	us-gaap	Real Estate Investments RealEstateInvestments	967177000	USD
CY2010Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	86501000	USD
CY2012Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	180756000	USD
CY2011Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	152587000	USD
CY2010Q4	us-gaap	Real Estate Accumulated Depreciation RealEstateAccumulatedDepreciation	125741000	USD
CY2011	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	29729000	USD
CY2010	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	26787000	USD
CY2011	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	2883000	USD
CY2012Q4	fsp	Real Estate Investment Accumulated Depreciation Other Than Real Estate Held For Sale RealEstateInvestmentAccumulatedDepreciationOtherThanRealEstateHeldForSale	180756000	USD
CY2011Q4	fsp	Real Estate Investment Accumulated Depreciation Other Than Real Estate Held For Sale RealEstateInvestmentAccumulatedDepreciationOtherThanRealEstateHeldForSale	148266000	USD
CY2010Q4	fsp	Real Estate Investment Accumulated Depreciation Other Than Real Estate Held For Sale RealEstateInvestmentAccumulatedDepreciationOtherThanRealEstateHeldForSale	119137000	USD
CY2010	fsp	Real Estate Accumulated Depreciation Assets Held For Sale RealEstateAccumulatedDepreciationAssetsHeldForSale	6604000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Accumulated Depreciation RealEstateAndAccumulatedDepreciationAccumulatedDepreciation	180756000	USD
CY2012Q4	fsp	Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Equipments RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsAndEquipments	1323384000	USD
CY2012Q4	fsp	Real Estate And Accumulated Depreciation Carrying Amount Of Buildings Improvements And Equipments RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsImprovementsAndEquipments	1179408000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Carrying Amount Of Land RealEstateAndAccumulatedDepreciationCarryingAmountOfLand	144336000	USD
CY2012Q4	fsp	Real Estate And Accumulated Depreciation Initial Cost Of Buildings Improvements And Equipment RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsImprovementsAndEquipment	1094563000	USD
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Initial Cost Of Land RealEstateAndAccumulatedDepreciationInitialCostOfLand	144831000	USD
CY2012Q4	us-gaap	Real Estate Federal Income Tax Basis RealEstateFederalIncomeTaxBasis	1406880	USD
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012Q2	dei	Entity Public Float EntityPublicFloat	771388918	USD
CY2012	fsp	Mortgage Loan On Real Estate Number Of Wholly Owned Subsidiaries Of Sponsored Rei Ts To Whom Loan Is Provided MortgageLoanOnRealEstateNumberOfWhollyOwnedSubsidiariesOfSponsoredREITsToWhomLoanIsProvided	7	note
CY2012	us-gaap	Real Estate Other Acquisitions RealEstateOtherAcquisitions	167812000	USD
CY2012	us-gaap	Real Estate Improvements RealEstateImprovements	16784000	USD
CY2012	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	20020000	USD
CY2011Q4	us-gaap	Real Estate Heldforsale RealEstateHeldforsale	19317000	USD
CY2012	us-gaap	Real Estate Accumulated Depreciation Depreciation Expense RealEstateAccumulatedDepreciationDepreciationExpense	33563000	USD
CY2012	us-gaap	Real Estate Accumulated Depreciation Real Estate Sold RealEstateAccumulatedDepreciationRealEstateSold	5394000	USD
CY2011	fsp	Real Estate Accumulated Depreciation Assets Held For Sale RealEstateAccumulatedDepreciationAssetsHeldForSale	4321000	USD
CY2010	fsp	Common Stock Dividends Per Share Cash Paid Long Term Capital Gain CommonStockDividendsPerShareCashPaidLongTermCapitalGain	0.00
CY2012Q4	us-gaap	Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Carrying Costs RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts	83990000	USD
CY2012	us-gaap	Comparability Of Prior Year Financial Data ComparabilityOfPriorYearFinancialData	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="MARGIN: 0in 0in 0pt"><i><font style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman" size="2">Reclassifications</font></i></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">Certain amounts in the 2011 and 2010 financial statements have been reclassified to conform to 2012 presentation. The reclassifications were related primarily to a property sold, which is presented as discontinued operations for all periods presented. Reclassifications of discontinued operations changed rental revenues, operating and maintenance expenses, and depreciation and amortization and the related assets.  There was no change to net income for any period presented as a result of these reclassifications.</font></p> <p style="MARGIN: 0in 0in 0pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p></div>
CY2011Q4	fsp	Deferred Rent Receivable Net Including Amounts For Assets Held For Sale DeferredRentReceivableNetIncludingAmountsForAssetsHeldForSale	28545000	USD
CY2012Q4	fsp	Deferred Rent Receivable Net Including Amounts For Assets Held For Sale DeferredRentReceivableNetIncludingAmountsForAssetsHeldForSale	35441000	USD
CY2012	fsp	Equity Method Investment Summarized Financial Information Gain Loss On Sale EquityMethodInvestmentSummarizedFinancialInformationGainLossOnSale	36610000	USD

Files In Submission

Name	View Source	Status
0001104659-13-011834-index-headers.html	Edgar Link	pending
0001104659-13-011834-index.html	Edgar Link	pending
0001104659-13-011834.txt	Edgar Link	pending
0001104659-13-011834-xbrl.zip	Edgar Link	pending
a12-28221_110k.htm	Edgar Link	pending
a12-28221_1ex21d1.htm	Edgar Link	pending
a12-28221_1ex23d1.htm	Edgar Link	pending
a12-28221_1ex31d1.htm	Edgar Link	pending
a12-28221_1ex31d2.htm	Edgar Link	pending
a12-28221_1ex32d1.htm	Edgar Link	pending
a12-28221_1ex32d2.htm	Edgar Link	pending
a12-28221_1ex99d1.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
fsp-20121231.xml	Edgar Link	completed
fsp-20121231.xsd	Edgar Link	pending
fsp-20121231_cal.xml	Edgar Link	unprocessable
fsp-20121231_def.xml	Edgar Link	unprocessable
fsp-20121231_lab.xml	Edgar Link	unprocessable
fsp-20121231_pre.xml	Edgar Link	unprocessable
g282211bki001.jpg	Edgar Link	pending
R1.htm	Edgar Link	pending
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$FSP
Franklin Street Properties Corp Stock $fsp

2011 Q4 Form 10-K Financial Statement

#000110465913011834 Filed on February 19, 2013

Income Statement

Balance Sheet

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$FSP Franklin Street Properties Corp Stock $fsp

2011 Q4 Form 10-K Financial Statement

#000110465913011834 Filed on February 19, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$FSP
Franklin Street Properties Corp Stock $fsp