XML 61 R50.htm IDEA: XBRL DOCUMENT
v3.24.3

LOANS RECEIVABLE - Summary of Aging Analysis of Modifications (Details) $ in Thousands | Sep. 30, 2024 USD ($)
--- | ---
Current |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | $ 12,831
30-89 Days Past Due |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 42
90 Days and Over |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 23
Total Past Due |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 65
Multifamily | Current |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 11,448
Multifamily | 30-89 Days Past Due |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 0
Multifamily | 90 Days and Over |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 0
Multifamily | Total Past Due |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 0
Nonresidential mortgage | Current |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 922
Nonresidential mortgage | 30-89 Days Past Due |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 0
Nonresidential mortgage | 90 Days and Over |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 0
Nonresidential mortgage | Total Past Due |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 0
Residential Mortgage | Current |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 461
Residential Mortgage | 30-89 Days Past Due |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 42
Residential Mortgage | 90 Days and Over |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 0
Residential Mortgage | Total Past Due |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 42
Home equity loans | Current |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 0
Home equity loans | 30-89 Days Past Due |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 0
Home equity loans | 90 Days and Over |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | 23
Home equity loans | Total Past Due |
Financing Receivable Modifications [Line Items] |
Financing receivable, modified in period | $ 23

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://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-34 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-33 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost of financing receivable 12 months after modification for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
Name: | us-gaap_FinancingReceivableModifiedPast12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=krny_FinancialAsset30To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=srt_MultifamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=krny_NonresidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |