XML 45 R35.htm IDEA: XBRL DOCUMENT v3.23.3

Loans Receivable (Details) - Schedule of Impairment By Class of Loans $ in Thousands	3 Months Ended
	Sep. 30, 2023 USD ($)
One-to four-family [Member]
Loans Receivable (Details) - Schedule of Impairment By Class of Loans [Line Items]
Average Recorded Investment	$ 3,167
Interest Income Recognized	24
Cash Basis Income Recognized	24
Multi-family [Member]
Loans Receivable (Details) - Schedule of Impairment By Class of Loans [Line Items]
Average Recorded Investment	567
Interest Income Recognized	5
Cash Basis Income Recognized	5
Multi-family [Member] | Loans Receivable [Member]
Loans Receivable (Details) - Schedule of Impairment By Class of Loans [Line Items]
Average Recorded Investment	5,654
Interest Income Recognized	38
Cash Basis Income Recognized	38
Farm [Member]
Loans Receivable (Details) - Schedule of Impairment By Class of Loans [Line Items]
Average Recorded Investment	266
Interest Income Recognized
Cash Basis Income Recognized
Nonresidential real estate [Member]
Loans Receivable (Details) - Schedule of Impairment By Class of Loans [Line Items]
Average Recorded Investment	1,211
Interest Income Recognized	2
Cash Basis Income Recognized	2
Consumer [Member]
Loans Receivable (Details) - Schedule of Impairment By Class of Loans [Line Items]
Average Recorded Investment	47
Interest Income Recognized	1
Cash Basis Income Recognized	1
Purchased credit-impaired loans [Member]
Loans Receivable (Details) - Schedule of Impairment By Class of Loans [Line Items]
Average Recorded Investment	396
Interest Income Recognized	6
Cash Basis Income Recognized	$ 6

X

- Definition

Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

+ References

No definition available.

+ Details

Name:	kffb_ImpairedFinancingReceivablesWithNoRelatedAllowanceAverageRecordedInvestment
Namespace Prefix:	kffb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	kffb_LoansReceivableDetailsScheduleofImpairmentByClassofLoansLineItems
Namespace Prefix:	kffb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

+ Details

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

X

- Details

Name:	kffb_ResidentialRealEstateFamilyAxis=kffb_ResidentialRealEstateOneToFourFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	kffb_ResidentialRealEstateFamilyAxis=kffb_ResidentialRealEstateMultiFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_LoansReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	kffb_ResidentialRealEstateFamilyAxis=kffb_FarmMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	kffb_ResidentialRealEstateFamilyAxis=kffb_NonresidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	kffb_ResidentialRealEstateFamilyAxis=kffb_ConsumerAndOtherMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	kffb_ResidentialRealEstateFamilyAxis=kffb_PurchasedCreditimpairedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: