Loans and Allowance for Credit Losses on Loans - Allowance for Credit Losses on Loans (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	$ 19,781	$ 20,249	$ 19,244	$ 21,212	$ 21,212
Charge-offs	(130)	(160)	(275)	(289)
Recoveries	35	37	66	73
Provision	505	183	1,156	645
Balance, end of period	20,191	20,309	20,191	20,309	19,244
Commercial Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	1,972	3,346	2,077	3,201	3,201
Charge-offs	(7)	(6)	(13)	(13)	(1,152)
Recoveries	9	9	18	18
Provision	105	(251)	(3)	(229)
Balance, end of period	2,079	3,098	2,079	3,098	2,077
Residential Real Estate [Member] \| Residential Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	4,475	3,869	4,237	2,794	2,794
Charge-offs	0	0	(44)	0	0
Recoveries	0	0	2	0
Provision	56	141	336	34
Balance, end of period	4,531	4,010	4,531	4,010	4,237
Real Estate [Member] \| Commercial Real Estate Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	12,648	12,356	12,218	14,839	14,839
Charge-offs	0	0	(5)	0	0
Recoveries	1	0	2	1
Provision	284	167	718	572
Balance, end of period	12,933	12,523	12,933	12,523	12,218
Home Equity [Member] \| Consumer Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	232	188	212	46	46
Charge-offs	0	0	(13)	0	0
Recoveries	0	0	0	0
Provision	2	4	35	29
Balance, end of period	234	192	234	192	212
Consumer [Member] \| Consumer Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period	454	490	500	332	332
Charge-offs	(123)	(154)	(200)	(276)	(481)
Recoveries	25	28	44	54
Provision	58	122	70	239
Balance, end of period	$ 414	$ 486	$ 414	486	500
Cumulative Effect Adjustment for ASU Implementation [Member] \| Adoption of ASU No. 2016-13 [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				(1,332)	(1,332)
Cumulative Effect Adjustment for ASU Implementation [Member] \| Adoption of ASU No. 2016-13 [Member] \| Commercial Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				121	121
Cumulative Effect Adjustment for ASU Implementation [Member] \| Residential Real Estate [Member] \| Adoption of ASU No. 2016-13 [Member] \| Residential Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				1,182	1,182
Cumulative Effect Adjustment for ASU Implementation [Member] \| Real Estate [Member] \| Adoption of ASU No. 2016-13 [Member] \| Commercial Real Estate Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				(2,889)	(2,889)
Cumulative Effect Adjustment for ASU Implementation [Member] \| Home Equity [Member] \| Adoption of ASU No. 2016-13 [Member] \| Consumer Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				117	117
Cumulative Effect Adjustment for ASU Implementation [Member] \| Consumer [Member] \| Adoption of ASU No. 2016-13 [Member] \| Consumer Portfolio [Member]
Activity and Allocation of Allowance for Credit Losses on Loans by Segment [Line Items]
Balance, beginning of period				$ 137	$ 137

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-11B

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

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (1)
-Publisher SEC

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (3)
-Publisher SEC

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

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

- Definition

Amount of increase in allowance for credit loss on financing receivable from recovery.

+ References

+ Details

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

- Definition

Amount of writeoff of financing receivable, charged against allowance for credit loss.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesWriteOffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of credit loss expense (reversal of expense) for financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(11))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

+ Details

Name:	us-gaap_ProvisionForLoanLossesExpensed
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_CumulativeEffectPeriodOfAdoptionAxis=srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201613Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: