XML 35 R25.htm IDEA: XBRL DOCUMENT
v3.23.1

Leases (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2023
Leases |
Summary of income relating to lease payments and undiscounted cash flows | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
Income relating to lease payments: | ​ | ​
​ | ​ | Three Months Ended
(in thousands) |  | March 31, 2023 | ​ | March 31, 2022
Income from leases (1) | ​ | $ | 37,418 | ​ | $ | 40,573
​ | ​ | $ | 37,418 | ​ | $ | 40,573
(1) Includes amounts recognized from variable lease payments were $10,852 and $12,665 for the three months ended March 31, 2023 and 2022, respectively. | ​ | ​ | ​ | ​ | ​ | ​

X
- Definition Tabular disclosure of components of income from operating lease and maturity of undiscounted cash flows to be received by lessor on annual basis for operating lease. + References No definition available. + Details
Name: | fsp_SummaryOfIncomeRelatingToLeasePaymentsAndUndiscountedCashFlows
Namespace Prefix: | fsp_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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