XML 37 R26.htm IDEA: XBRL DOCUMENT v3.25.1

Basis of Presentation - Schedule of Illustrates the Impact (Details) $ in Thousands	Jul. 01, 2023 USD ($)
One-to-four-family [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	$ 1,597
One-to-four-family [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	857
One-to-four-family [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	740
Multi-family [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	133
Multi-family [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	278
Multi-family [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	(145)
Construction [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	138
Construction [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	41
Construction [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	97
Land [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	15
Land [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	1
Land [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	14
Farm [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	6
Farm [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	4
Farm [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	2
Nonresidential real estate [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	184
Nonresidential real estate [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	405
Nonresidential real estate [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	(221)
Commercial and industrial [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	5
Commercial and industrial [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	23
Commercial and industrial [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	(18)
Loans on deposits [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets
Loans on deposits [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	1
Loans on deposits [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	(1)
Home equity [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	51
Home equity [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	23
Home equity [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	28
Automobile [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	1
Automobile [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets
Automobile [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	1
Unsecured [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	1
Unsecured [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	1
Unsecured [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets
Allowance for credit losses on loans [Member] | As Reported Under ASC 326 [Member]
Residential real estate:
Assets	2,131
Allowance for credit losses on loans [Member] | Pre-ASC 326 Adoption [Member]
Residential real estate:
Assets	1,634
Allowance for credit losses on loans [Member] | Impact of ASC 326 Adoption [Member]
Residential real estate:
Assets	497
Allowance for credit losses on unfunded credit exposures [Member] | As Reported Under ASC 326 [Member]
Liabilities:
Allowance for credit losses on unfunded credit exposures	54
Allowance for credit losses on unfunded credit exposures [Member] | Pre-ASC 326 Adoption [Member]
Liabilities:
Allowance for credit losses on unfunded credit exposures
Allowance for credit losses on unfunded credit exposures [Member] | Impact of ASC 326 Adoption [Member]
Liabilities:
Allowance for credit losses on unfunded credit exposures	$ 54

X

- Definition

Amount of allowance for credit loss on financing receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-4

+ Details

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

X

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (1)
-Publisher SEC

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (3)
-Publisher SEC

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

+ Details

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

X

- References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=kffb_ResidentialRealEstateOneToFourFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=kffb_AsReportedUnderASC326Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=kffb_PreASC326AdoptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=kffb_ImpactOfASC326AdoptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=kffb_ResidentialRealEstateMultiFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConstructionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_LandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=kffb_FarmMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=kffb_NonresidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=kffb_CommercialsAndIndustrialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=kffb_LoansOnDepositsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=kffb_HomeEquityLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_AutomobilesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=kffb_UnsecuredMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=kffb_AllowanceForCreditLossesOnLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=kffb_AllowanceForCreditLossesOnUnfundedCreditExposuresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: