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Commitments and Credit Risk - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jul. 01, 2022
Commitments And Contingencies Disclosure [Line Items] |  |  |
Outstanding commitments to originate loans amount | $ 5,081,000 | $ 28,024,000 |
Loan amount commitments at fixed rates of interest | $ 3,454,200 | $ 15,704,000 |
Weighted average interest rates for fixed rate loan commitments | 7.48% | 4.36% |
Off-Balance-Sheet, Credit loss, Liability | $ 216,000 | $ 0 | $ 496,000,000
Off-Balance-Sheet, Credit Loss,Credit Loss Expense | 280,000 |  |
Commercial [Member] |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Lines of credit to borrowers | 80,497,000 | 116,284,000 |
Open End Consumer Lines [Member] |  |  |
Commitments And Contingencies Disclosure [Line Items] |  |  |
Lines of credit to borrowers | $ 13,663,000 | $ 11,468,000 |

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- Definition Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482454/460-10-45-1 + Details
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