XML 50 R39.htm IDEA: XBRL DOCUMENT v3.21.1

Disclosures About Fair Value of Assets and Liabilities (Details) - Schedule of fair value measurements for financial instruments measured at fair value on a non-recurring basis $ in Thousands	9 Months Ended
	Mar. 31, 2021 USD ($)
Foreclosed and repossessed assets:
Fair Value	$ 465
Valuation Technique(s)	Sales comparison approach
Unobservable Input(s)	Adjustments for differences between comparable sales
Range (Weighted Average)	-2.7% to 41.2% (20.4%)

X

- Definition

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

+ References

No definition available.

+ Details

Name:	kffb_FairValueMeasurementsValuationTechniques1
Namespace Prefix:	kffb_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	kffb_FinancialInstrumentsMeasuredAtFairValue
Namespace Prefix:	kffb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

Description of uncertainty of fair value measurement from use of unobservable input, including, but not limited to, inter-relationships among inputs used in fair value measurement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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