v3.25.2
Disclosures about Fair Value of Assets - Quantitative Information about Unobservable Inputs Used in Recurring and Nonrecurring Level 3 Fair Value Measurements (Detail)
$ in Thousands
 12 Months Ended
Jun. 30, 2025
USD ($)
mo
yr
Jun. 30, 2024
USD ($)
mo
yr
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights $ 1,429 $ 1,491
State and political subdivisions $ 1,748 $ 2,057
Discount Rate [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 9.5 10
Minimum [Member] | Constant Prepayment Rate [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 4.9 6.2
Minimum [Member] | Probability of Default [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 0.07 0.08
Minimum [Member] | Maturity/Call Date [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input | mo 1 1
Minimum [Member] | Weighted average coupon [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 2.97 2.97
Minimum [Member] | Marketability yield adjustment [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 1 1
Maximum [Member] | Constant Prepayment Rate [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 9.8 8
Maximum [Member] | Probability of Default [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 0.12 0.12
Maximum [Member] | Maturity/Call Date [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input | yr 6 7
Maximum [Member] | Weighted average coupon [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 3.08 3.08
Maximum [Member] | Marketability yield adjustment [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 2 2
Weighted Average [Member] | Constant Prepayment Rate [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 9.2 7.7
Weighted Average [Member] | Probability of Default [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 0.12 0.11
Weighted Average [Member] | Weighted average coupon [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 3.04 3.03
Weighted Average [Member] | Marketability yield adjustment [Member] | Discounted Cash Flow [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Mortgage servicing rights, measurement input 1.6 1.6