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Note 13 - Postretirement Medical Benefits (Details) - Amounts Recognized in Accumulated Other Comprehensive Income (Postretirement Medical Benefits [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Postretirement Medical Benefits [Member]
    
Note 13 - Postretirement Medical Benefits (Details) - Amounts Recognized in Accumulated Other Comprehensive Income [Line Items]    
Unrecognized net actuarial loss (gain) $ 295us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
/ us-gaap_PlanNameAxis
= ffkt_PostretirementMedicalBenefitsMember		 $ (1,190)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
/ us-gaap_PlanNameAxis
= ffkt_PostretirementMedicalBenefitsMember
Unrecognized prior service cost 175us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax
/ us-gaap_PlanNameAxis
= ffkt_PostretirementMedicalBenefitsMember		 383us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax
/ us-gaap_PlanNameAxis
= ffkt_PostretirementMedicalBenefitsMember
Total $ 470us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
/ us-gaap_PlanNameAxis
= ffkt_PostretirementMedicalBenefitsMember		 $ (807)us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
/ us-gaap_PlanNameAxis
= ffkt_PostretirementMedicalBenefitsMember