Borrowings (Details) - USD ($)	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Collateral pledged on Federal Home Loan Bank advances	$ 861,100,000	$ 967,600,000
Purchase of FHLB - San Francisco stock	63,000	1,266,000
Federal Home Loan Bank Advances
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Federal Home Loan Bank advances, unused borrowing facility	261,300,000	287,900,000
FHLB - San Francisco advances	238,500,000	235,009,000
Federal funds facility
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Federal Home Loan Bank advances, Maximum borrowing capacity	50,000,000.0	50,000,000.0
Federal Reserve Bank of San Francisco \| Discount window facility
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Federal Home Loan Bank advances, Maximum borrowing capacity	208,600,000	139,000,000.0
Advances outstanding	0	0
Federal Reserve Bank of San Francisco \| Federal funds facility
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Federal Home Loan Bank advances, Maximum borrowing capacity	50,000,000.0	50,000,000.0
Advances outstanding	0	0
Federal home loan - Bank of SanFrancisco
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Federal Home Loan Bank advances, unused borrowing facility	261,300,000	287,900,000
FHLB - San Francisco advances	238,500,000	235,000,000.0
Federal Home Loan Bank advances, Maximum borrowing capacity	516,000,000.0	534,100,000
Federal Home Loan Bank stock, required investment	9,600,000	9,500,000
Federal Home Loan Bank stock, excess investment	0	0
Federal Home Loan Bank stock, cash dividends distributed	793,000	556,000
Purchase of FHLB - San Francisco stock	63,000	1,300,000
Federal home loan - Bank of SanFrancisco \| Letters of credit
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Outstanding letters of credit	16,000,000.0	11,000,000.0
Federal home loan - Bank of SanFrancisco \| MPF credit enhancement
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Advances outstanding	$ 216,000	$ 216,000
Federal home loan - Bank of SanFrancisco \| Maximum
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Federal Home Loan Bank advances, limit on borrowing capacity (percent of total assets)	40.00%	40.00%
Federal home loan - Bank of SanFrancisco \| Mortgage Loans on Real Estate
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Collateral pledged on Federal Home Loan Bank advances	$ 774,100,000	$ 967,600,000
Federal home loan - Bank of SanFrancisco \| Investment securities
Discount window facility is with FHLB and Federal Reserve Bank of San Francisco
Collateral pledged on Federal Home Loan Bank advances	$ 3,900,000	$ 4,200,000

Federal Home Loan Bank, Advances, Limitation on Borrowing Capacity, Percent

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Federal Home Loan Bank Stock, Cash Dividends

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Federal Home Loan Bank Stock, Excess Investment

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Federal Home Loan Bank Stock, Required Investment

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of cash outflow to acquire Federal Home Loan Bank (FHLB) stock.

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