XML 66 R34.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Significant Accounting Policies (Details) (USD $) |  | 0 Months Ended | 1 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 entity | Dec. 20, 2012 FSP Phoenix Tower Corp | Sep. 30, 2006 FSP Phoenix Tower Corp | Dec. 31, 2007 East Wacker | May 31, 2009 Grand Boulevard
Significant Accounting Policies |  |  |  |  |
Number of corporations organized to operate as real estate investment trusts (REITs) | 14 |  |  |  |
Number of REITs in which the entity holds non-controlling preferred stock interest | 2 |  |  |  |
Required investment balance for recognition of distributions received as income | $ 0 |  |  |  |
Sponsored REITs |  |  |  |  |
Preferred shares purchased |  |  | 48 | 965.75 | 175.5
Percentage of outstanding preferred shares purchased |  |  | 4.60% | 43.70% | 27.00%
Net cost of preferred shares purchased |  |  | 4,116,000 | 82,813,000 | 15,049,000
Gain on sale, less applicable income tax |  | $ 1,600,000 |  |  |

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 Represents the amount of required balance of investments for recognition of distributions received as income. These investments are accounted for under the equity method of accounting. + References No definition available. + Details
Name: | fsp_EquityMethodInvestmentRequiredBalanceForRecognitionOfDistributionsReceivedAsIncome
Namespace Prefix: | fsp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the number of entities in which the reporting entity has a non-controlling common stock interest. + References No definition available. + Details
Name: | fsp_NumberOfREITsInWhichEntityHoldsNoncontrollingCommonStockInterest
Namespace Prefix: | fsp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of entities in which the reporting entity has a non-controlling preferred stock interest. + References No definition available. + Details
Name: | fsp_NumberOfREITsInWhichEntityHoldsNoncontrollingPreferredStockInterest
Namespace Prefix: | fsp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of an equity method investment. + References No definition available. + Details
Name: | us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration