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Federal Home Loan Bank Advances and Other Borrowings - Additional Information (Detail) - USD ($) |  | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2023
Federal Home Loan Bank, Advances [Line Items] |  |  |
Federal Home Loan Bank advances | $ 32,999,000 | $ 32,999,000 | $ 19,500,000
Mortgage loans secured for Federal Home Loan Bank Advances | 408,196,000,000 | 408,196,000,000 |
Other borrowings | 25,250,000 | 25,250,000 | 0
Maximum amount of outstanding agreements |  | 18,377,000 | 11,050,000
Repurchase agreement monthly average amount |  | 16,276,000 | 10,015,000
Repurchase agreements | 17,772,000 | 17,772,000 | 10,787,000
Maturity Overnight [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Repurchase agreements | 17,772,000 | 17,772,000 |
Fed Funds Line Of Credit Facility From Cibc Bank Usa [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Line of credit maximum borrowing capacity | 10,000,000 | 10,000,000 |
Lines of credit | $ 0 | 0 | $ 0
Letter of Credit [Member] | Public Unit Deposit Letter Of Credit One [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Debt Instrument Maturity Date | May 06, 2025 |  |
Letters of Credit Outstanding, Amount | $ 90,000,000,000 | 90,000,000,000 |
Letter of Credit [Member] | Public Unit Deposit Letter Of Credit Two [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Debt Instrument Maturity Date | Nov. 29, 2024 |  |
Letters of Credit Outstanding, Amount | $ 6,500,000,000 | 6,500,000,000 |
Letter of Credit [Member] | Public Unit Deposit Letter Of Credit Three [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Debt Instrument Maturity Date | Nov. 29, 2024 |  |
Letters of Credit Outstanding, Amount | $ 11,000,000,000 | 11,000,000,000 |
Letter of Credit [Member] | Public Unit Deposit Letter Of Credit Four [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Debt Instrument Maturity Date | Dec. 29, 2024 |  |
Letters of Credit Outstanding, Amount | $ 9,000,000,000 | $ 9,000,000,000 |
Letter of Credit [Member] | Public Deposit Unit Letter Of Credit One Two Three And Four [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 0.065% | 0.065% |
Letter of Credit [Member] | Public Deposit Unit Letter Of Credit [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 0.065%
Letters of Credit Outstanding, Amount |  |  | $ 80,000,000,000
Federal Reserve Bank Advances [Member] | Asset Pledged as Collateral [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Other borrowings |  |  | $ 0
Debt Instrument, Face Amount | $ 25,272,000 | $ 25,272,000 |
Federal Reserve Bank Advances [Member] | Debt Instrument, Redemption, Period One [Member] | Asset Pledged as Collateral [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Debt Instrument Maturity Date | Jan. 16, 2025 |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.76% | 4.76% |
Other borrowings | $ 25,250,000 | $ 25,250,000 |
Maximum [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Federal Home Loan Bank advances interest rate range from | 5.29% | 5.29% |
Minimum [Member] |  |  |
Federal Home Loan Bank, Advances [Line Items] |  |  |
Federal Home Loan Bank advances interest rate range from | 0.00% | 0.00% |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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