Note 12 - Fair Value Measurements - Quantitative Information about Unobservable Inputs for Assets Measured on a Nonrecurring Basis Using Level 3 Measurements (Details) - USD ($)	9 Months Ended	12 Months Ended
Sep. 30, 2016	Dec. 31, 2015
Impaired Loans [Member] \| Fair Value, Inputs, Level 3 [Member] \| Income Approach Valuation Technique [Member] \| Minimum [Member]
Marketability discount	0.00%	0.00%
Impaired Loans [Member] \| Fair Value, Inputs, Level 3 [Member] \| Income Approach Valuation Technique [Member] \| Maximum [Member]
Marketability discount	67.80%	8.30%
Impaired Loans [Member] \| Fair Value, Inputs, Level 3 [Member] \| Income Approach Valuation Technique [Member] \| Weighted Average [Member]
Marketability discount	8.30%	7.90%
Impaired Loans [Member] \| Fair Value, Inputs, Level 3 [Member] \| Income Approach Valuation Technique [Member]
Fair Value	$ 244,000	$ 6,628,000
Valuation Technique	Discounted appraisals	Discounted appraisals
Unobservable Inputs	Marketability discount	Marketability discount
Impaired Loans [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value	$ 244,000	$ 6,628,000
Impaired Loans [Member]
Fair Value	$ 244,000	$ 6,628,000
Fair Value, Inputs, Level 3 [Member] \| Income Approach Valuation Technique [Member] \| Minimum [Member] \| OREO [Member]
Marketability discount	1.90%	2.30%
Fair Value, Inputs, Level 3 [Member] \| Income Approach Valuation Technique [Member] \| Maximum [Member] \| OREO [Member]
Marketability discount	45.40%	26.90%
Fair Value, Inputs, Level 3 [Member] \| Income Approach Valuation Technique [Member] \| Weighted Average [Member] \| OREO [Member]
Marketability discount	15.00%	6.50%
Fair Value, Inputs, Level 3 [Member] \| Income Approach Valuation Technique [Member] \| OREO [Member]
Fair Value	$ 6,639,000	$ 5,526,000
Valuation Technique	Discounted appraisals	Discounted appraisals
Unobservable Inputs	Marketability discount	Marketability discount

This item represents a description of the valuation technique used to measure fair value using significant unobservable inputs (Level 3) as applied to the identified category of asset.

No definition available.

+ Details

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

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Adjustment to the discount rate used to measure fair value for lack of ability to convert business interests into cash quickly.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

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

- Definition

Description of the inputs and valuation technique(s) used to measure fair value.

+ References

+ Details

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- Details

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- Details

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- Details

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- Details

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- Details

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