Percentage of employee contributions paid by the company related to postretirement benefits identified as Plan 1.

No definition available.

Name:	ffkt_CompanyContributionsPlan1
Namespace Prefix:	ffkt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of contributions paid by the company and the employee related to postretirement benefits identified as Plan 2.

+ References

No definition available.

+ Details

Name:	ffkt_ContributionsPlan2
Namespace Prefix:	ffkt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The assumed health care cost trend rate for year three used to measure the expected cost of benefits covered by the plan (gross eligible charges).

+ References

No definition available.

+ Details

Name:	ffkt_DefinedBenefitPlanHealthCareCostTrendRateAssumedYearThree
Namespace Prefix:	ffkt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The assumed health care cost trend rate for the second year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

+ References

No definition available.

+ Details

Name:	ffkt_DefinedBenefitPlanHealthCareCostTrendRateAssumedYearTwo
Namespace Prefix:	ffkt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum age requirement upon retirement to be eligible for postretirement medical benefits.

+ References

No definition available.

+ Details

Name:	ffkt_EmployeeAgeRequirement
Namespace Prefix:	ffkt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Years of full time service required to be eligible for postretirement medical benefits.

+ References

No definition available.

+ Details

Name:	ffkt_EmployeeServiceRequirement
Namespace Prefix:	ffkt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

Name:	ffkt_Note11RetirementPlansDetailsLineItems
Namespace Prefix:	ffkt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of participants who meet the Company's eligibility requirements for lifetime medical and dental benefits upon retirement.

+ References

No definition available.

+ Details

Name:	ffkt_NumberOfPostretirementMedicalAndDentalPlanParticipants
Namespace Prefix:	ffkt_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Health Care Cost Trend Rate
-URI http://asc.fasb.org/extlink&oid=6514820

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (l)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The ultimate trend rate for health care costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (l)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

+ Details

Name:	us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=ffkt_Plan1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=ffkt_Plan2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=ffkt_MedicalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=ffkt_DentalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 11 - Retirement Plans (Details) $ in Thousands	12 Months Ended
Note 11 - Retirement Plans (Details) $ in Thousands	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Note 11 - Retirement Plans (Details) [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%
Defined Contribution Plan, Cost Recognized (in Dollars)	$ 531	$ 483	$ 528
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year (in Dollars)	$ 393
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year	6.50%
Defined Benefit Plan, Health Care Cost Trend Rate Assumed Year Two	6.00%
Defined Benefit Plan Health Care Cost Trend Rate Assumed Year Three	5.50%
Plan 1 [Member]
Note 11 - Retirement Plans (Details) [Line Items]
Number of Post-retirement Medical and Dental Plan Participants	38
Company Contributions Plan 1	100.00%
Plan 2 [Member]
Note 11 - Retirement Plans (Details) [Line Items]
Employee Service Requirement	20 years
Employee Age Requirement	55 years
Contributions Plan 2	50.00%
Medical [Member]
Note 11 - Retirement Plans (Details) [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.75%
Dental [Member]
Note 11 - Retirement Plans (Details) [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%