XML 43 R32.htm IDEA: XBRL DOCUMENT v3.25.3

Loans Receivable - Schedule of Tables Present the Amortized Cost Basis of Loans on Nonaccrual Status and Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025
Nonaccrual [Member]
Residential real estate
Nonaccrual	$ 3,075	$ 3,273
Nonaccrual [Member] | One- to Four-Family Residential Real Estate [Member]
Residential real estate
Nonaccrual	2,456	1,924
Nonaccrual [Member] | Construction [Member]
Residential real estate
Nonaccrual	290	291
Nonaccrual [Member] | Nonresidential real estate [Member]
Residential real estate
Nonaccrual	201	927
Nonaccrual [Member] | Unsecured [Member]
Residential real estate
Nonaccrual	128	131
Loans Past Due Over 89 Days Still Accruing [Member]
Residential real estate
Loans Past Due Over 89 Days Still Accruing	154	592
Loans Past Due Over 89 Days Still Accruing [Member] | One- to Four-Family Residential Real Estate [Member]
Residential real estate
Loans Past Due Over 89 Days Still Accruing	154	592
Loans Past Due Over 89 Days Still Accruing [Member] | Construction [Member]
Residential real estate
Loans Past Due Over 89 Days Still Accruing
Loans Past Due Over 89 Days Still Accruing [Member] | Nonresidential real estate [Member]
Residential real estate
Loans Past Due Over 89 Days Still Accruing
Loans Past Due Over 89 Days Still Accruing [Member] | Unsecured [Member]
Residential real estate
Loans Past Due Over 89 Days Still Accruing

X

- Definition

Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-7

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 80
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-80

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (3)
-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (2)
-Publisher SEC

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-16

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=kffb_NonaccrualMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=kffb_OneToFourfamilyResidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=kffb_ResidentialRealEstateConstructionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=kffb_LoansPastDueOver89DaysStillAccruingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: