Loans Receivable - Additional Information (Details)	12 Months Ended
Jun. 30, 2025 USD ($) loan property	Jun. 30, 2024 USD ($) property	Jun. 30, 2023 USD ($)
Financing Receivable Recorded Investment [Line Items]
Loans and leases receivable, related parties	$ 2,300,000	$ 2,400,000
Number of new loans to related parties \| loan	1
Loans granted to related parties during year	$ 13,000	0
Interest income on non-accrual loans	0	$ 0	$ 0
Financing receivable, modified, commitment to lend	$ 0
Number of modified loans \| property	1	2
TDR defaults	$ 8,600,000	$ 514,000
Financing receivable, individually evaluated for impairment	45,600,000
Allowance for credit losses PCD loans	12,700,000	15,700,000
Carrying amount of PCD loans	175,000	141,000
Collateral Pledged
Financing Receivable Recorded Investment [Line Items]
Financing receivable, individually evaluated for impairment	$ 37,785,000	32,613,000
Nonresidential Property
Financing Receivable Recorded Investment [Line Items]
Number of other real estate owned acquired through foreclosure \| property	0
Residential Mortgage
Financing Receivable Recorded Investment [Line Items]
Number of loans in process of foreclosure \| loan	3
Commercial Mortgage
Financing Receivable Recorded Investment [Line Items]
Number of loans in process of foreclosure \| loan	6
Mortgage loans in process of foreclosure, carrying value	$ 23,700,000	13,600,000
One- to four-family residential mortgage
Financing Receivable Recorded Investment [Line Items]
Mortgage loans in process of foreclosure, carrying value	2,200,000	1,200,000
One- to four-family residential mortgage \| Collateral Pledged
Financing Receivable Recorded Investment [Line Items]
Financing receivable, individually evaluated for impairment	$ 2,264,000	$ 1,406,000

Financing Receivable, Modified Loans

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Mortgage loans in process of foreclosure, number of loans.

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Number of new loans to related parties.

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Real Estate Acquired Through Foreclosure, Number Of Properties

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Amount of increase in allowance for credit loss on financing receivable purchased with credit deterioration.

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Amount of financing receivable individually evaluated for credit loss. Excludes financing receivable collectively evaluated for credit loss.

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Amortized cost of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

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Amount of interest income on financing receivable on nonaccrual status.

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Amount at par value of financing receivable purchased with credit deterioration.

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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.

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Amount of commitment to lend additional funds to debtor experiencing financial difficulty for which creditor has modified terms of financing receivable.

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For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

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Reflects the amount of new advances made to related parties in the form of loan and lease receivables.

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Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

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