XML 92 R77.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Loans (Details 10) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($)
Loans And Leases Receivable Disclosure [Abstract] |
Par value of acquired loans at acquisition | $ 483,666
Net purchase discount | (4,207)
Allowance for credit losses of PCD loans | (1,295)
Fair value of loans at acquisition | $ 478,164

X
- Definition Allowance for credit losses of PCD loans. + References No definition available. + Details
Name: | fmnb_AllowanceForCreditLossesOfPCDLoans
Namespace Prefix: | fmnb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Net purchase discount. + References No definition available. + Details
Name: | fmnb_NetPurchaseDiscount
Namespace Prefix: | fmnb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Par value of acquired loans at acquisition. + References No definition available. + Details
Name: | fmnb_ParValueOfAcquiredLoansAtAcquisition
Namespace Prefix: | fmnb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition The cash outflow for the purchase of loan receivable arising from the financing of goods and services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireLoansReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration