Represents the collateral dependent loans value of significant properties.

No definition available.

Name:	fcap_CollateralDependentLoansValueOfSignificantProperties
Namespace Prefix:	fcap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the loan payments delinquency period beyond which a loan is considered past-due.

+ References

No definition available.

+ Details

Name:	fcap_LoanPaymentsDelinquencyPeriodBeyondWhichLoanIsConsideredPastDue
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time that a borrower must demonstrate the ability to make future payments of principal and interest as scheduled to have a loan restored to accrual status.

+ References

No definition available.

+ Details

Name:	fcap_NonaccrualLoansPerformancePeriod
Namespace Prefix:	fcap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

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-Publisher SEC
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-Name Regulation S-K (SK)
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-Paragraph (a)
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+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Threshold period for when financing receivable is considered past due to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Period of time between issuance and maturity of customer deposits, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher SEC
-Name Industry Guide
-Number 3
-Section V
-Paragraph D-E

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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Balance Type:
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- Details

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- Details

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Namespace Prefix:
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Balance Type:
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- Details

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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2023	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Loan Payments Delinquency Period Beyond Which Loan is Considered Past Due (Day)	90 days
Nonaccrual Loans Performance Period (Month)	6 months
Collateral Dependent Loans, Value of Significant Properties	$ 200,000
Financing Receivable, Allowance for Credit Loss, Ending Balance	$ 6,772,000		$ 6,083,000	$ 6,625,000	$ 5,061,000
Subsequent Event [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member] \| Accounting Standards Update 2016-13 [Member]
Financing Receivable, Allowance for Credit Loss, Ending Balance		$ 700,000
Bank Overdrafts [Member]
Financing Receivable, Threshold Period Past Due, Writeoff (Day)	45 days
Consumer Portfolio Segment [Member]
Financing Receivable, Threshold Period Past Due, Writeoff (Day)	90 days
Maximum [Member]
Maturity of Time Deposits (Day)	90 days