XML 43 R28.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Commitments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2015
Office buildings and industrial properties |
Commitments |
Schedule of future minimum lease payments |
|  | Year ending |
(in thousands) |  | December 31, |
2016 |  | $ | 178,224 |
2017 |  |  | 163,837 |
2018 |  |  | 145,576 |
2019 |  |  | 116,730 |
2020 |  |  | 90,940 |
Thereafter (2021-2029) |  |  | 201,991 |
|  | $ | 897,298 |
Corporate office space |
Commitments |
Schedule of future minimum lease payments |
|  | Year ending |
(in thousands) |  | December 31, |
2016 |  | $ | 428 |
2017 |  |  | 324 |
|  | $ | 752 |

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_PropertySubjectToOrAvailableForOperatingLeaseLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
Name: | us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MajorPropertyClassAxis=fsp_OfficeBuildingsAndIndustrialPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MajorPropertyClassAxis=fsp_CorporateOfficeSpaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |