Note 10 - Postretirement Medical Benefits (Details) $ in Thousands	3 Months Ended
Mar. 31, 2016 USD ($)
Note 10 - Postretirement Medical Benefits (Details) [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	$ 393
Other Postretirement Benefits Payments	$ 81
Plan 2 [Member]
Note 10 - Postretirement Medical Benefits (Details) [Line Items]
Employee Service Requirement	20 years
Employee Age Requirement	55 years
Contributions Plan 2	50.00%
Plan 1 [Member]
Note 10 - Postretirement Medical Benefits (Details) [Line Items]
Company Contributions Plan 1	100.00%

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

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_Note10PostretirementMedicalBenefitsDetailsLineItems
Namespace Prefix:	ffkt_
Data Type:	xbrli:stringItemType
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=65897934&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 cash or cash equivalents contributed during the reporting period by the entity to fund non-pension postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 25
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585

+ Details

Name:	us-gaap_OtherPostretirementBenefitsPayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

- Details

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