Investment Securities - Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Jun. 30, 2023
Short-Term Debt [Line Items]
Total available borrowing capacity across all sources	$ 519,900	$ 476,900
Total balance of loans	1,047	1,312
Pledged as Collateral \| Pledged to FRB
Short-Term Debt [Line Items]
Total balance of loans	178,600	0
Federal Home Loan Bank Advances [Member]
Short-Term Debt [Line Items]
Federal Home Loan Bank advances, unused borrowing facility	261,300	287,900
Pledged to FRB \| Discount Window Facility
Short-Term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	208,600	139,000
Securities held as collateral	126,600	150,300
Advances outstanding	0	0
Federal Funds Purchased [Member]
Short-Term Debt [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 50,000	$ 50,000

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

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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 borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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The carrying amount (fair value) as of the balance sheet date of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell or re-pledge such securities.

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