XML 46 R32.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Significant Accounting Policies - Inv in non-consolidated REITs (Details) - USD ($) |  |  | 1 Months Ended
--- | --- | --- | ---
May 29, 2009 | Dec. 27, 2007 | May 31, 2009 | Dec. 31, 2007
East Wacker |  |  |  |
Investment in Sponsored REITs |  |  |  |
Preferred shares purchased |  | 965.75 |  | 965.75
Percentage of outstanding preferred shares purchased |  | 43.70% |  | 43.70%
Net cost of preferred shares purchased |  | $ 82,813,000 |  |
Grand Boulevard |  |  |  |
Investment in Sponsored REITs |  |  |  |
Preferred shares purchased | 175.5 |  | 175.5 |
Percentage of outstanding preferred shares purchased | 27.00% |  | 27.00% |
Net cost of preferred shares purchased | $ 15,049,000 |  |  |

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: | num: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 Represents the cost of preferred stock purchased in the investee accounted for under the equity method of accounting, net of commission and fees paid. + References No definition available. + Details
Name: | fsp_EquityMethodInvestmentPreferredStockPurchasedNet
Namespace Prefix: | fsp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=fsp_FSP303EastWackerDriveCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=fsp_FSPGrandBoulevardCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |