SECURITIES (Details 4) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Debt Instrument, Par Value	$ 3,200
Debt Securities Amortized Cost	1,087
Debt Instrument, Fair Value	282
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings	26
Preferred Term Securities Four [Member] \| Mezzanine [Member]
Debt Instrument, Par Value	244
Debt Securities Amortized Cost	122
Debt Instrument, Fair Value	111
Debt Instrument, Debt Default, Amount	18,000
Debt Instrument, Debt Default To Current Collateral, Percentage	27.00%
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings	0
Preferred Term Securities Six [Member] \| Mezzanine [Member]
Debt Instrument, Par Value	208
Debt Securities Amortized Cost	16
Debt Instrument, Fair Value	16
Debt Instrument, Debt Default, Amount	30,000
Debt Instrument, Debt Default To Current Collateral, Percentage	74.00%
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings	26
Preferred Term Securities Fifteen B 1 [Member] \| Mezzanine [Member]
Debt Instrument, Par Value	1,065
Debt Securities Amortized Cost	445
Debt Instrument, Fair Value	125
Debt Instrument, Debt Default, Amount	195,200
Debt Instrument, Debt Default To Current Collateral, Percentage	34.00%
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings	0
Preferred Term Securities Twenty One C 2 [Member] \| Mezzanine [Member]
Debt Instrument, Par Value	1,156
Debt Securities Amortized Cost	415
Debt Instrument, Fair Value	30
Debt Instrument, Debt Default, Amount	209,890
Debt Instrument, Debt Default To Current Collateral, Percentage	29.00%
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings	0
Preferred Term Securities Twenty Two C 1 [Member] \| Mezzanine [Member]
Debt Instrument, Par Value	527
Debt Securities Amortized Cost	89
Debt Instrument, Fair Value	0
Debt Instrument, Debt Default, Amount	388,000
Debt Instrument, Debt Default To Current Collateral, Percentage	30.00%
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings	$ 0
Moody'S Credit Ratings When Purchased [Member] \| Preferred Term Securities Four [Member] \| Mezzanine [Member]
Debt Instrument, Credit Rating	A3
Moody'S Credit Ratings When Purchased [Member] \| Preferred Term Securities Six [Member] \| Mezzanine [Member]
Debt Instrument, Credit Rating	A1
Moody'S Credit Ratings When Purchased [Member] \| Preferred Term Securities Fifteen B 1 [Member] \| Mezzanine [Member]
Debt Instrument, Credit Rating	A2
Moody'S Credit Ratings When Purchased [Member] \| Preferred Term Securities Twenty One C 2 [Member] \| Mezzanine [Member]
Debt Instrument, Credit Rating	A3
Moody'S Credit Ratings When Purchased [Member] \| Preferred Term Securities Twenty Two C 1 [Member] \| Mezzanine [Member]
Debt Instrument, Credit Rating	A3
Current Moody'S Credit Ratings [Member] \| Preferred Term Securities Four [Member] \| Mezzanine [Member]
Debt Instrument, Credit Rating	Ca
Current Moody'S Credit Ratings [Member] \| Preferred Term Securities Six [Member] \| Mezzanine [Member]
Debt Instrument, Credit Rating	Ca
Current Moody'S Credit Ratings [Member] \| Preferred Term Securities Fifteen B 1 [Member] \| Mezzanine [Member]
Debt Instrument, Credit Rating	C
Current Moody'S Credit Ratings [Member] \| Preferred Term Securities Twenty One C 2 [Member] \| Mezzanine [Member]
Debt Instrument, Credit Rating	C
Current Moody'S Credit Ratings [Member] \| Preferred Term Securities Twenty Two C 1 [Member] \| Mezzanine [Member]
Debt Instrument, Credit Rating	Ca

Percentage of debt instrument defaults rate to the current collateral.

No definition available.

Name:	ffky_DebtInstrumentDebtDefaultToCurrentCollateralPercentage
Namespace Prefix:	ffky_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the cost of debt securities for the period.

+ References

No definition available.

+ Details

Name:	ffky_DebtSecuritiesAmortizedCostBasis
Namespace Prefix:	ffky_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of outstanding long-term debt or borrowing associated with any securities or credit agreement for which there has been a default in principal, interest, sinking fund, or redemption provisions, or any breach of covenant that existed at the end of the period and subsequently has not been cured.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(c))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph c

-Article 4

+ Details

Name:	us-gaap_DebtDefaultLongtermDebtAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the credit rating indicative of likelihood of repayment of the debt instrument given by a credit rating agency (for example, Standard and Poor's, Moody's, Fitch).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_DebtInstrumentCreditRating
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13476-108611

+ Details

Name:	us-gaap_DebtInstrumentFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 16B

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 7

-Footnote 2

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 15D

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS115-1/124-1

-Paragraph 15C

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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