XML 88 R70.htm IDEA: XBRL DOCUMENT
v3.25.2

Stockholders’ Equity and Regulatory Capital (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2024 | Apr. 30, 2020 | Jun. 30, 2025 | Jun. 30, 2024
Stockholders’ Equity and Regulatory Capital [Line Items] |  |  |  |
Percentage of housing-related finance |  |  | 65.00% |
Common equity tier 1 capital ratio | 9.00% |  | 16.83% |
Tier one capital ratio of at least | 11.00% |  | 16.83% |
Capital ratio of at least | 12.00% |  | 16.83% |
Leverage ratio of at least | 9.00% |  | 9.97% |
Average total consolidated assets (in Dollars) |  |  | $ 10,000,000,000 |
Percentage of leverage ratio |  | 9.00% | 9.00% |
Percentage of transition temporary |  | 8.00% |  |
Percentage of temporary CBLR |  | 9.00% |  |
Percentage of minimum CBLR |  | 8.50% |  |
Percentage of common equity tier one risk-based capital ratio |  |  | 6.50% |
Percentage of tier one risk-based capital ratio |  |  | 8.00% |
Percentage of total risk-based capital ratio |  |  | 10.00% |
Percentage of tier one leverage ratio |  |  | 5.00% |
Percentage of CCB |  |  | 2.50% |
Dividends (in Dollars) |  |  | $ 0 | $ 950,000
Maximum [Member] |  |  |  |
Stockholders’ Equity and Regulatory Capital [Line Items] |  |  |  |
Percentage of changes temporarily |  | 9.00% |  |
Minimum [Member] |  |  |  |
Stockholders’ Equity and Regulatory Capital [Line Items] |  |  |  |
Percentage of changes temporarily |  | 8.00% |  |

X
- Definition Represent the amount of average total consolidated assets. + References No definition available. + Details
Name: | kffb_AverageTotalConsolidatedAssets
Namespace Prefix: | kffb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of capital ratio of at least. + References No definition available. + Details
Name: | kffb_CapitalRatioOfAtLeast
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of tier 1 capital. + References No definition available. + Details
Name: | kffb_CommonEquityTierOneCapitals
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of leverage ratio. + References No definition available. + Details
Name: | kffb_LeverageRatio
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of leverage ratio of at least. + References No definition available. + Details
Name: | kffb_LeverageRatioOfAtLeast
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of banking regulation total risks based capital ratio under capitalized minimum. + References No definition available. + Details
Name: | kffb_PercentageOfBankingRegulationTotalRisksBasedCapitalRatioUnderCapitalizedMinimum
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of changes temporarily. + References No definition available. + Details
Name: | kffb_PercentageOfChangesTemporarily
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of common equity tier one risk-based capital ratio. + References No definition available. + Details
Name: | kffb_PercentageOfCommonEquityTierOneRiskBasedCapitalRatio
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of minimum CBLR. + References No definition available. + Details
Name: | kffb_PercentageOfMinimumCBLR
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of temporary CBLR. + References No definition available. + Details
Name: | kffb_PercentageOfTemporaryCBLR
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of tier one leverage ratio. + References No definition available. + Details
Name: | kffb_PercentageOfTierOneLeverageRatio
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of tier one risk-based capital ratio. + References No definition available. + Details
Name: | kffb_PercentageOfTierOneRiskBasedCapitalRatio
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of total risk-based capital ratio. + References No definition available. + Details
Name: | kffb_PercentageOfTotalRiskBasedCapitalRatio
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of transition temporary. + References No definition available. + Details
Name: | kffb_PercentageOfTransitionTemporary
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of tier 1 capital ratio of at least. + References No definition available. + Details
Name: | kffb_TierOneCapitalRatioOfAtLeast
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477270/942-505-50-1 + Details
Name: | us-gaap_ComplianceWithRegulatoryCapitalRequirementsUnderBankingRegulationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 2 -SubTopic 405 -Topic 942 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477787/942-405-45-2 + Details
Name: | us-gaap_Dividends
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage charged for managing real estate properties. + References No definition available. + Details
Name: | us-gaap_PropertyManagementFeePercentFee
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |