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Note 17 - Commitments and Contingencies - Commitments to Extend Credit (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Fixed rate | $ 4,542 | $ 4,007
Adjustable rate | 10,661 | 3,854
Commitments to extend credit | 105,318 | 73,428
Unused Lines of Credit On Credit Cards [Member] |  |
Commitments to extend credit | 5,463 | 4,429
Undisbursed Commercial and Personal Lines of Credit [Member] |  |
Commitments to extend credit | 32,125 | 29,359
Undisbursed Portion of Construction Loans in Process [Member] |  |
Commitments to extend credit | 19,037 | 4,869
Undisbursed Portion of Home Equity Lines of Credit [Member] |  |
Commitments to extend credit | $ 33,490 | $ 26,910

X
- Definition The amount of unfunded commitments to extend credit. + References No definition available. + Details
Name: | fcap_UnfundedCommitmentsToExtendCredit
Namespace Prefix: | fcap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of fixed rate unfunded credit commitments. + References No definition available. + Details
Name: | fcap_UnfundedCreditCommitmentsFixedRate
Namespace Prefix: | fcap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount variable rate unfunded credit commitments. + References No definition available. + Details
Name: | fcap_UnfundedCreditCommitmentsVariableRate
Namespace Prefix: | fcap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fcap_UnusedLinesOfCreditOnCreditCardsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fcap_UndisbursedCommercialAndPersonalLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fcap_UndisbursedPortionOfConstructionLoansInProcessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=fcap_UndisbursedPortionOfHomeEquityLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |