XML 81 R71.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Sep. 30, 2021 | Mar. 31, 2020 | Sep. 30, 2022
Commitments And Contingencies [Abstract] |  |  |  |
Allowance against letters of credit | $ 2,400 |  |  | $ 1,500
Letters of credit cancelled |  | $ 636 | $ 250 |

X
- Definition Letters of credit cancelled. + References No definition available. + Details
Name: | fraf_LettersOfCreditCancelled
Namespace Prefix: | fraf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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