Loans Held for Investment - Schedule of Allowance For Credit Losses and Recorded Investment in Gross Loans, by Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]
ACL, beginning of period	$ 6,424	$ 7,065
Recovery of credit losses	(644)	(736)
ACL, end of period	5,780	6,329
Allowance for credit losses: Collectively evaluated for impairment	5,780	6,329
Loans held for investment: Individually evaluated for allowances	1,509	732
Loans held for investment: Collectively evaluated for allowances	1,036,316	1,044,935
Total loans held for investment	$ 1,037,825	$ 1,045,667	$ 1,042,423
ACL on loans as a percentage of gross loans held for investment	0.56%	0.61%
Commercial business loans
Financing Receivable, Allowance for Credit Losses [Line Items]
ACL, beginning of period	$ 6	$ 11
Recovery of credit losses	(2)	(1)
ACL, end of period	4	10
Allowance for credit losses: Collectively evaluated for impairment	4	10
Loans held for investment: Collectively evaluated for allowances	1,324	1,510
Total loans held for investment	$ 1,324	$ 1,510	1,267
ACL on loans as a percentage of gross loans held for investment	0.30%	0.66%
Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans held for investment: Collectively evaluated for allowances	$ 61	$ 63
Total loans held for investment	61	63	57
Single-family \| Mortgage loans
Financing Receivable, Allowance for Credit Losses [Line Items]
ACL, beginning of period	5,734	6,295
Recovery of credit losses	(608)	(616)
ACL, end of period	5,126	5,679
Allowance for credit losses: Collectively evaluated for impairment	5,126	5,679
Loans held for investment: Individually evaluated for allowances	189	732
Loans held for investment: Collectively evaluated for allowances	549,346	523,503
Total loans held for investment	$ 549,535	$ 524,235	544,425
ACL on loans as a percentage of gross loans held for investment	0.93%	1.08%
Multi-family \| Mortgage loans
Financing Receivable, Allowance for Credit Losses [Line Items]
ACL, beginning of period	$ 615	$ 595
Recovery of credit losses	(31)	(92)
ACL, end of period	584	503
Allowance for credit losses: Collectively evaluated for impairment	584	503
Loans held for investment: Individually evaluated for allowances	1,320
Loans held for investment: Collectively evaluated for allowances	413,855	435,782
Total loans held for investment	$ 415,175	$ 435,782	423,417
ACL on loans as a percentage of gross loans held for investment	0.14%	0.12%
Commercial real estate \| Mortgage loans
Financing Receivable, Allowance for Credit Losses [Line Items]
ACL, beginning of period	$ 55	$ 66
Recovery of credit losses	(2)	(8)
ACL, end of period	53	58
Allowance for credit losses: Collectively evaluated for impairment	53	58
Loans held for investment: Collectively evaluated for allowances	71,010	81,169
Total loans held for investment	$ 71,010	$ 81,169	72,766
ACL on loans as a percentage of gross loans held for investment	0.07%	0.07%
Construction \| Mortgage loans
Financing Receivable, Allowance for Credit Losses [Line Items]
ACL, beginning of period	$ 12	$ 97
Recovery of credit losses		(19)
ACL, end of period	12	78
Allowance for credit losses: Collectively evaluated for impairment	12	78
Loans held for investment: Collectively evaluated for allowances	632	2,816
Total loans held for investment	$ 632	$ 2,816	402
ACL on loans as a percentage of gross loans held for investment	1.90%	2.77%
Other \| Mortgage loans
Financing Receivable, Allowance for Credit Losses [Line Items]
ACL, beginning of period	$ 2	$ 1
Recovery of credit losses	(1)
ACL, end of period	1	1
Allowance for credit losses: Collectively evaluated for impairment	1	1
Loans held for investment: Collectively evaluated for allowances	88	92
Total loans held for investment	$ 88	$ 92	$ 89
ACL on loans as a percentage of gross loans held for investment	1.14%	1.09%

Represents amount of allowance for loan losses as a percentage of gross loans-held for investment.

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- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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Amount of allowance for credit loss on financing receivable evaluated on collective basis. Excludes financing receivable evaluated on individual basis.

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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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Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease.

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Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

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