XML 77 R66.htm IDEA: XBRL DOCUMENT
v3.19.2

Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018 | Jun. 30, 2018
Commitments And Contingencies [Abstract] |  |  |
Allowance against letters of credit | $ 2,400 | $ 2,361 | $ 2,361

X
- Definition Off Balance Sheet Reserves + References No definition available. + Details
Name: | fraf_OffBalanceSheetReserves
Namespace Prefix: | fraf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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