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Disclosures about Fair Value of Assets - Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements Recognized in Accompanying Balance Sheet (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Mortgage Servicing Rights [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning Balance $ 1,463 $ 1,013
Total realized and unrealized gains and losses included in net income 101 426
Servicing rights that result from asset transfers 89 287
Payments received and loans refinanced (171) (263)
Ending Balance 1,482 1,463
Total gains or losses for the period included in net income attributable to the change in unrealized gains or losses related to assets and liabilities still held at the reporting date 101  
State and Political Subdivision [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning Balance 2,662 0
Total realized and unrealized gains and losses included in net income   1,110
Purchases   1,552
Settlements (301)  
Ending Balance $ 2,361 $ 2,662