XML 115 R101.htm IDEA: XBRL DOCUMENT
v3.19.1

Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Jul. 31, 2018
Commitments And Contingencies [Abstract] |  |
Standby letters of credit extension period, in years | 1 year |
Allowance against letters of credit | $ 2,361 |
Accrued settlement payment |  | $ 10,000

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
- Definition Standby Letters Of Credit Extension Periods + References No definition available. + Details
Name: | fraf_StandbyLettersOfCreditExtensionPeriods
Namespace Prefix: | fraf_
Data Type: | xbrli:durationItemType
Balance Type: | na
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

X
- Definition Amount of loss contingency liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant