XML 57 R42.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Related Party Transactions and Investments in Non-Consolidated Entities - Equity in losses of investment in non-consolidated REITs (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 06, 2021 | Dec. 31, 2007 | Dec. 31, 2021 | Dec. 31, 2019
Sponsored REITs |  |  |  |
Equity in income (loss) |  |  | $ 421 |
Proceeds received from liquidating trust |  |  |  | $ 1,470
Distributions received from non-consolidated REITs |  |  |  |
Distributions from non-consolidated REITs |  |  | 421 |
East Wacker |  |  |  |
Sponsored REITs |  |  |  |
Equity in income (loss) | $ 400 |  | 421 |
Preferred shares purchased |  | 965.75 |  |
Percentage of outstanding preferred shares purchased |  | 43.70% |  |
Distributions received from non-consolidated REITs |  |  |  |
Distributions from non-consolidated REITs |  |  | $ 421 |

X
- Definition Represents a distribution from non-consolidated REITS which constitutes a return of investment. + References No definition available. + Details
Name: | fsp_EquityMethodInvestmentDistributionInExcessOfEarnings
Namespace Prefix: | fsp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | fsp_EquityMethodInvestmentDividendsOrDistributionsAbstract
Namespace Prefix: | fsp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of the equity method investee's outstanding preferred stock purchased by the entity during the reporting period. + References No definition available. + Details
Name: | fsp_EquityMethodInvestmentPercentageOfPreferredStockPurchased
Namespace Prefix: | fsp_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of preferred stock purchased in the investee accounted for under the equity method of accounting. + References No definition available. + Details
Name: | fsp_EquityMethodInvestmentPreferredStockPurchased
Namespace Prefix: | fsp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from liquidating trust. + References No definition available. + Details
Name: | fsp_ProceedsFromLiquidatingTrust
Namespace Prefix: | fsp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(12)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(10)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)(f)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 + Details
Name: | us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=fsp_FSP303EastWackerDriveCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |